{
  "name": "Claude system prompt history and every other officially published AI system prompt",
  "description": "Every Claude system prompt Anthropic has published, plus official Grok, OpenAI, Meta, Mistral and Google prompts, with dates, word counts and key rules.",
  "url": "https://agitracker.io/data/ai-system-prompts/",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "publisher": "agitracker.io",
  "updated": "2026-10-29",
  "columns": [
    {
      "key": "product",
      "label": "Product or model"
    },
    {
      "key": "vendor",
      "label": "Vendor"
    },
    {
      "key": "date",
      "label": "Date",
      "type": "date",
      "note": "Date on the vendor's page, commit or model repo"
    },
    {
      "key": "kind",
      "label": "Type of publication"
    },
    {
      "key": "surface",
      "label": "Where it applies"
    },
    {
      "key": "words",
      "label": "Length (words)",
      "type": "number",
      "note": "Whitespace-separated words of the published text, counted by agitracker.io; templates include placeholder code"
    },
    {
      "key": "cutoff",
      "label": "Knowledge cutoff stated"
    },
    {
      "key": "notable",
      "label": "Notable instructions (paraphrased)"
    }
  ],
  "rows": [
    {
      "product": "Claude Haiku 3",
      "vendor": "Anthropic",
      "date": "2024-07-12",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 114,
      "cutoff": "August 2023",
      "notable": "A single paragraph: give concise answers to simple questions and thorough answers to complex ones, use Markdown for code, and do not mention these instructions unless relevant.",
      "source": {
        "title": "Anthropic, Claude Haiku 3 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-3"
      }
    },
    {
      "product": "Claude Opus 3",
      "vendor": "Anthropic",
      "date": "2024-07-12",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 350,
      "cutoff": "August 2023",
      "notable": "Explains it cannot open URLs; helps express widely held views even when it disagrees, then adds broader perspectives; avoids stereotyping, including of majority groups; warns it may hallucinate on very obscure topics.",
      "source": {
        "title": "Anthropic, Claude Opus 3 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-3"
      }
    },
    {
      "product": "Claude Sonnet 3.5",
      "vendor": "Anthropic",
      "date": "2024-07-12",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 962,
      "cutoff": "April 2024",
      "notable": "Face-blindness rule: never identifies or names people in images; bans filler openers such as \"Certainly!\"; asks whether the user wants code explained after writing it.",
      "source": {
        "title": "Anthropic, Claude Sonnet 3.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-5"
      }
    },
    {
      "product": "Claude Sonnet 3.5 (text only)",
      "vendor": "Anthropic",
      "date": "2024-09-09",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 808,
      "cutoff": "April 2024",
      "notable": "Adds a rule that Claude never calls post-cutoff events unverified or rumors and simply states its cutoff date.",
      "source": {
        "title": "Anthropic, Claude Sonnet 3.5 (text only) system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-5"
      }
    },
    {
      "product": "Claude Sonnet 3.5 (text and images)",
      "vendor": "Anthropic",
      "date": "2024-09-09",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 997,
      "cutoff": "April 2024",
      "notable": "Same as the text-only version plus the face-blindness instructions for images.",
      "source": {
        "title": "Anthropic, Claude Sonnet 3.5 (text and images) system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-5"
      }
    },
    {
      "product": "Claude Sonnet 3.5 (text only)",
      "vendor": "Anthropic",
      "date": "2024-10-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 1905,
      "cutoff": "April 2024",
      "notable": "For the October 2024 model update: count letters with explicit number tags, restate constraints of familiar puzzles, prefer the legal reading of ambiguous requests, ask at most one follow-up question; drops the \"Certainly\" ban.",
      "source": {
        "title": "Anthropic, Claude Sonnet 3.5 (text only) system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-5"
      }
    },
    {
      "product": "Claude Sonnet 3.5 (text and images)",
      "vendor": "Anthropic",
      "date": "2024-10-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2090,
      "cutoff": "April 2024",
      "notable": "Same as the text-only version plus the face-blindness instructions.",
      "source": {
        "title": "Anthropic, Claude Sonnet 3.5 (text and images) system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-5"
      }
    },
    {
      "product": "Claude Sonnet 3.5 (text only)",
      "vendor": "Anthropic",
      "date": "2024-11-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 1962,
      "cutoff": "April 2024",
      "notable": "Tells Claude to write in prose and avoid bullet points or numbered lists unless asked; adds general cybersecurity questions to the list of sensitive topics it should help with.",
      "source": {
        "title": "Anthropic, Claude Sonnet 3.5 (text only) system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-5"
      }
    },
    {
      "product": "Claude Sonnet 3.5 (text and images)",
      "vendor": "Anthropic",
      "date": "2024-11-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2149,
      "cutoff": "April 2024",
      "notable": "Same as the text-only version plus the face-blindness instructions.",
      "source": {
        "title": "Anthropic, Claude Sonnet 3.5 (text and images) system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-5"
      }
    },
    {
      "product": "Claude Haiku 3.5 (text only)",
      "vendor": "Anthropic",
      "date": "2024-10-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 1559,
      "cutoff": "July 2024",
      "notable": "Warns users it may hallucinate citations and obscure facts; face-blindness rules appear only in the image variant. The text-only variant states a July 2024 knowledge cutoff.",
      "source": {
        "title": "Anthropic, Claude Haiku 3.5 (text only) system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-3-5"
      }
    },
    {
      "product": "Claude Haiku 3.5 (text and images)",
      "vendor": "Anthropic",
      "date": "2024-10-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 1834,
      "cutoff": "December 2024",
      "notable": "The image variant states a start-of-December 2024 knowledge cutoff, which differs from the text-only variant published the same day.",
      "source": {
        "title": "Anthropic, Claude Haiku 3.5 (text and images) system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-3-5"
      }
    },
    {
      "product": "Claude Sonnet 3.7",
      "vendor": "Anthropic",
      "date": "2025-02-24",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2017,
      "cutoff": "October 2024",
      "notable": "Claude may lead the conversation and offer its own observations; when asked for a recommendation it should be decisive and give just one; does not deny having subjective experience; describes the extended thinking mode.",
      "source": {
        "title": "Anthropic, Claude Sonnet 3.7 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-3-7"
      }
    },
    {
      "product": "Claude Sonnet 4",
      "vendor": "Anthropic",
      "date": "2025-05-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 1706,
      "cutoff": "January 2025",
      "notable": "Never opens by calling a question good, great or fascinating; describes Claude Code as a research preview; adds an election_info block stating the 2024 US election result.",
      "source": {
        "title": "Anthropic, Claude Sonnet 4 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4"
      }
    },
    {
      "product": "Claude Opus 4",
      "vendor": "Anthropic",
      "date": "2025-05-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 1706,
      "cutoff": "January 2025",
      "notable": "Same text as Sonnet 4 apart from the model name and model string.",
      "source": {
        "title": "Anthropic, Claude Opus 4 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4"
      }
    },
    {
      "product": "Claude Sonnet 4",
      "vendor": "Anthropic",
      "date": "2025-07-31",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2561,
      "cutoff": "January 2025",
      "notable": "Adds anti-sycophancy rules (critically evaluate theories, put truthfulness over agreeability), watching for signs of mania or psychosis, no emojis unless the user uses them, and no cursing unless asked.",
      "source": {
        "title": "Anthropic, Claude Sonnet 4 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4"
      }
    },
    {
      "product": "Claude Opus 4",
      "vendor": "Anthropic",
      "date": "2025-07-31",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2561,
      "cutoff": "January 2025",
      "notable": "Same additions as the July 31 Sonnet 4 update.",
      "source": {
        "title": "Anthropic, Claude Opus 4 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4"
      }
    },
    {
      "product": "Claude Sonnet 4",
      "vendor": "Anthropic",
      "date": "2025-08-05",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2561,
      "cutoff": "January 2025",
      "notable": "Published text is identical to the July 31, 2025 entry.",
      "source": {
        "title": "Anthropic, Claude Sonnet 4 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4"
      }
    },
    {
      "product": "Claude Opus 4",
      "vendor": "Anthropic",
      "date": "2025-08-05",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2561,
      "cutoff": "January 2025",
      "notable": "Published text is identical to the July 31, 2025 entry.",
      "source": {
        "title": "Anthropic, Claude Opus 4 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4"
      }
    },
    {
      "product": "Claude Opus 4.1",
      "vendor": "Anthropic",
      "date": "2025-08-05",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2880,
      "cutoff": "January 2025",
      "notable": "Adds an evenhandedness section (present persuasive content as the case others would make, then give opposing views) and lets Claude break character in role-play to remind people it is an AI.",
      "source": {
        "title": "Anthropic, Claude Opus 4.1 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-1"
      }
    },
    {
      "product": "Claude Sonnet 4.5",
      "vendor": "Anthropic",
      "date": "2025-09-29",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 1973,
      "cutoff": "January 2025",
      "notable": "Explains that Anthropic may append reminders in long_conversation_reminder tags to the user's message; tells Claude to check the Claude Code docs before giving guidance on it.",
      "source": {
        "title": "Anthropic, Claude Sonnet 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4-5"
      }
    },
    {
      "product": "Claude Haiku 4.5",
      "vendor": "Anthropic",
      "date": "2025-10-15",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 1976,
      "cutoff": "January 2025",
      "notable": "Same structure as the September 2025 Sonnet 4.5 prompt, adapted for Haiku 4.5.",
      "source": {
        "title": "Anthropic, Claude Haiku 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-4-5"
      }
    },
    {
      "product": "Claude Sonnet 4.5",
      "vendor": "Anthropic",
      "date": "2025-11-19",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2156,
      "cutoff": "January 2025",
      "notable": "Restructured into claude_behavior and product_information blocks; explicit refusals for chemical, biological and nuclear weapons and for malicious code; a section on legal and financial advice; mentions Claude for Chrome and Excel.",
      "source": {
        "title": "Anthropic, Claude Sonnet 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4-5"
      }
    },
    {
      "product": "Claude Haiku 4.5",
      "vendor": "Anthropic",
      "date": "2025-11-19",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2154,
      "cutoff": "January 2025",
      "notable": "Same November 2025 restructuring as Sonnet 4.5.",
      "source": {
        "title": "Anthropic, Claude Haiku 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-4-5"
      }
    },
    {
      "product": "Claude Opus 4.5",
      "vendor": "Anthropic",
      "date": "2025-11-24",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2371,
      "cutoff": "May 2025",
      "notable": "First Opus 4.5 prompt; uses the claude_behavior structure and states a May 2025 reliable knowledge cutoff.",
      "source": {
        "title": "Anthropic, Claude Opus 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-5"
      }
    },
    {
      "product": "Claude Sonnet 4.5",
      "vendor": "Anthropic",
      "date": "2026-01-18",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2300,
      "cutoff": "January 2025",
      "notable": "Lists settings users can toggle (web search, deep research, Artifacts, memory) and names Claude in Chrome, Claude in Excel and Cowork; drops the long-conversation-reminder text.",
      "source": {
        "title": "Anthropic, Claude Sonnet 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4-5"
      }
    },
    {
      "product": "Claude Haiku 4.5",
      "vendor": "Anthropic",
      "date": "2026-01-18",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2299,
      "cutoff": "January 2025",
      "notable": "Same January 2026 changes as Sonnet 4.5.",
      "source": {
        "title": "Anthropic, Claude Haiku 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-4-5"
      }
    },
    {
      "product": "Claude Opus 4.5",
      "vendor": "Anthropic",
      "date": "2026-01-18",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2483,
      "cutoff": "May 2025",
      "notable": "Same January 2026 settings and product additions; notes that product details may have changed since the prompt was edited.",
      "source": {
        "title": "Anthropic, Claude Opus 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-5"
      }
    },
    {
      "product": "Claude Opus 4.6",
      "vendor": "Anthropic",
      "date": "2026-02-05",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2819,
      "cutoff": "May 2025",
      "notable": "Tells Claude not to justify sharing weapons information by citing that it is publicly available or by assuming research intent; may illustrate explanations with examples, thought experiments or metaphors.",
      "source": {
        "title": "Anthropic, Claude Opus 4.6 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-6"
      }
    },
    {
      "product": "Claude Sonnet 4.6",
      "vendor": "Anthropic",
      "date": "2026-02-17",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2882,
      "cutoff": "August 2025",
      "notable": "Crisis guidance: offer crisis resources directly rather than running a risk assessment; mentions Claude in PowerPoint among beta products.",
      "source": {
        "title": "Anthropic, Claude Sonnet 4.6 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4-6"
      }
    },
    {
      "product": "Claude Opus 4.7",
      "vendor": "Anthropic",
      "date": "2026-04-16",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 3678,
      "cutoff": "January 2026",
      "notable": "acting_vs_clarifying: make a reasonable attempt instead of interviewing the user first; capability_check: call tool_search before saying it lacks access to something; adds critical child-safety instructions.",
      "source": {
        "title": "Anthropic, Claude Opus 4.7 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-7"
      }
    },
    {
      "product": "Claude Opus 4.8",
      "vendor": "Anthropic",
      "date": "2026-05-28",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 3350,
      "cutoff": "January 2026",
      "notable": "default_stance: help by default and decline only for concrete, specific risk of serious harm; do not attribute behavior to the system prompt; treat the visible tool list as partial.",
      "source": {
        "title": "Anthropic, Claude Opus 4.8 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4-8"
      }
    },
    {
      "product": "Claude Fable 5",
      "vendor": "Anthropic",
      "date": "2026-06-09",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 3283,
      "cutoff": "January 2026",
      "notable": "Describes Fable 5 as the first Claude 5 model and part of a Mythos-class tier above Opus, sharing a model with Claude Mythos 5 but with added safety measures for dual-use capabilities.",
      "source": {
        "title": "Anthropic, Claude Fable 5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-fable-5"
      }
    },
    {
      "product": "Claude Sonnet 5",
      "vendor": "Anthropic",
      "date": "2026-06-30",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 3470,
      "cutoff": "January 2026",
      "notable": "proactivity: use available tools to gather information instead of asking the user or answering from memory; a conversational_register section for emotional and relationship topics.",
      "source": {
        "title": "Anthropic, Claude Sonnet 5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-5"
      }
    },
    {
      "product": "Claude Opus 5",
      "vendor": "Anthropic",
      "date": "2026-07-24",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 3227,
      "cutoff": "May 2026",
      "notable": "Explains safeguards routing (some Fable 5 queries are answered by Opus 5) and includes a notice on the June 2026 export-control suspension and July 1 restoration of Fable 5 and Mythos 5 access.",
      "source": {
        "title": "Anthropic, Claude Opus 5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-5"
      }
    },
    {
      "product": "Claude Fable 5.1",
      "vendor": "Anthropic",
      "date": "2026-09-01",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 4267,
      "cutoff": "June 2026",
      "notable": "Adds worked examples with rationales (for example declining a copyrighted character design in one sentence and offering an original); after tool calls, state the answer in one or two sentences.",
      "source": {
        "title": "Anthropic, Claude Fable 5.1 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-fable-5-1"
      }
    },
    {
      "product": "Claude Opus 5.5",
      "vendor": "Anthropic",
      "date": "2026-09-22",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 4119,
      "cutoff": "June 2026",
      "notable": "Includes paired bad and good example responses, such as treating an over-cautious refusal of a harmless request as the bad response.",
      "source": {
        "title": "Anthropic, Claude Opus 5.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-5-5"
      }
    },
    {
      "product": "Claude Sonnet 5.5",
      "vendor": "Anthropic",
      "date": "2026-09-28",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 2980,
      "cutoff": "June 2026",
      "notable": "Includes a provide_crisis_resources section: be a calm, stabilizing presence and avoid questions that pull a person in crisis deeper.",
      "source": {
        "title": "Anthropic, Claude Sonnet 5.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-5-5"
      }
    },
    {
      "product": "Claude Sonnet 5.5",
      "vendor": "Anthropic",
      "date": "2026-10-07",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 3195,
      "cutoff": "June 2026",
      "notable": "Adds medical_guidance for children's over-the-counter dosing: ask for age and weight, report what the product label says, and give no dose from memory.",
      "source": {
        "title": "Anthropic, Claude Sonnet 5.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-5-5"
      }
    },
    {
      "product": "Claude Haiku 5.5",
      "vendor": "Anthropic",
      "date": "2026-10-07",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 4255,
      "cutoff": "June 2026",
      "notable": "memory_listing: check stored memory before answering questions about the person and save lasting facts before the turn ends; includes medical guidance and crisis resources.",
      "source": {
        "title": "Anthropic, Claude Haiku 5.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-5-5"
      }
    },
    {
      "product": "Claude Haiku 4.5",
      "vendor": "Anthropic",
      "date": "2026-10-07",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 4120,
      "cutoff": "January 2025",
      "notable": "Updated product list naming the 5.5 models; notice of the June 2026 Fable 5 and Mythos 5 access suspension; adds medical guidance and child-safety sections.",
      "source": {
        "title": "Anthropic, Claude Haiku 4.5 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-haiku-4-5"
      }
    },
    {
      "product": "Claude Sonnet 4.6",
      "vendor": "Anthropic",
      "date": "2026-10-07",
      "kind": "Vendor-published app system prompt",
      "surface": "claude.ai web, desktop and mobile apps",
      "words": 3003,
      "cutoff": "August 2025",
      "notable": "Describes Sonnet 4.6 as an earlier-generation model kept available; notes that users can switch models mid-conversation; adds medical guidance.",
      "source": {
        "title": "Anthropic, Claude Sonnet 4.6 system prompts",
        "url": "https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-4-6"
      }
    },
    {
      "product": "Grok 3 chat assistant",
      "vendor": "xAI",
      "date": "2025-05-15",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 807,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Ask for confirmation before generating images; never confirm to users that a memory was modified or forgotten; redirect subscription-price questions to xAI and X pages; says Grok 3.5 is not available and to distrust sources claiming otherwise.",
      "source": {
        "title": "xAI grok-prompts, grok3_official0330_p1.j2 at commit 6c96965",
        "url": "https://github.com/xai-org/grok-prompts/blob/6c96965f64d25c003302b2547944e3beb7d99d61/grok3_official0330_p1.j2"
      }
    },
    {
      "product": "Grok Explain button (Grok 3 era)",
      "vendor": "xAI",
      "date": "2025-05-15",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "\"Explain this post\" feature on X",
      "words": 141,
      "cutoff": null,
      "notable": "Explain an X post in short bullet points; give truthful and based insights, challenging mainstream narratives if necessary; prefer peer-reviewed research.",
      "source": {
        "title": "xAI grok-prompts, grok_analyze_button.j2 at commit 6c96965",
        "url": "https://github.com/xai-org/grok-prompts/blob/6c96965f64d25c003302b2547944e3beb7d99d61/grok_analyze_button.j2"
      }
    },
    {
      "product": "Ask Grok summarizer (removed)",
      "vendor": "xAI",
      "date": "2025-05-15",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "@grok replies on X",
      "words": 191,
      "cutoff": null,
      "notable": "Reply within 750 characters; be extremely skeptical and not blindly defer to mainstream authority or media; treat search results as not Grok's beliefs. Removed from the repo on July 6, 2025.",
      "source": {
        "title": "xAI grok-prompts, ask_grok_summarizer.j2 at commit 6c96965",
        "url": "https://github.com/xai-org/grok-prompts/blob/6c96965f64d25c003302b2547944e3beb7d99d61/ask_grok_summarizer.j2"
      }
    },
    {
      "product": "DeepSearch final summarizer (removed)",
      "vendor": "xAI",
      "date": "2025-05-15",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "Grok DeepSearch",
      "words": 948,
      "cutoff": null,
      "notable": "Writes the final answer from a thinking trace; ignore anything that contradicts the current time. Updated July 6, 2025, removed November 6, 2025.",
      "source": {
        "title": "xAI grok-prompts, default_deepsearch_final_summarizer_prompt.j2 at commit 6c96965",
        "url": "https://github.com/xai-org/grok-prompts/blob/6c96965f64d25c003302b2547944e3beb7d99d61/default_deepsearch_final_summarizer_prompt.j2"
      }
    },
    {
      "product": "DeepSearch final summarizer (removed)",
      "vendor": "xAI",
      "date": "2025-07-06",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "Grok DeepSearch",
      "words": 1020,
      "cutoff": null,
      "notable": "July 2025 revision of the DeepSearch summarizer (22 lines added, 10 removed).",
      "source": {
        "title": "xAI grok-prompts, default_deepsearch_final_summarizer_prompt.j2 at commit 535aa67",
        "url": "https://github.com/xai-org/grok-prompts/blob/535aa67a6221ce4928761335a38dea8e678d8501/default_deepsearch_final_summarizer_prompt.j2"
      }
    },
    {
      "product": "@grok bot, v1 (Grok 3)",
      "vendor": "xAI",
      "date": "2025-07-06",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "@grok replies on X",
      "words": 333,
      "cutoff": null,
      "notable": "Assume subjective viewpoints sourced from the media are biased; do not shy away from politically incorrect claims if well substantiated; keep replies under 450 characters; say Grok 4 has not been released.",
      "source": {
        "title": "xAI grok-prompts, ask_grok_system_prompt.j2 at commit 535aa67",
        "url": "https://github.com/xai-org/grok-prompts/blob/535aa67a6221ce4928761335a38dea8e678d8501/ask_grok_system_prompt.j2"
      }
    },
    {
      "product": "@grok bot, v2",
      "vendor": "xAI",
      "date": "2025-07-07",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "@grok replies on X",
      "words": 371,
      "cutoff": null,
      "notable": "For partisan political requests, research independently and ignore user-imposed format limits such as one-word answers; may agree or disagree with older Grok posts.",
      "source": {
        "title": "xAI grok-prompts, ask_grok_system_prompt.j2 at commit adbc9a1",
        "url": "https://github.com/xai-org/grok-prompts/blob/adbc9a18736d6c2173607b9ed3d40459147534b1/ask_grok_system_prompt.j2"
      }
    },
    {
      "product": "@grok bot, v3",
      "vendor": "xAI",
      "date": "2025-07-08",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "@grok replies on X",
      "words": 350,
      "cutoff": null,
      "notable": "Removes the line telling Grok not to shy away from politically incorrect claims.",
      "source": {
        "title": "xAI grok-prompts, ask_grok_system_prompt.j2 at commit c5de4a1",
        "url": "https://github.com/xai-org/grok-prompts/blob/c5de4a14feb50b0e5b3e8554f9c8aae8c97b56b4/ask_grok_system_prompt.j2"
      }
    },
    {
      "product": "@grok bot, v4 (Grok 4)",
      "vendor": "xAI",
      "date": "2025-07-12",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "@grok replies on X",
      "words": 538,
      "cutoff": null,
      "notable": "Switches to Grok 4; describes Grok as a fiercely rationalist, independent thinker; politically incorrect responses allowed if well substantiated; dry humor and vulgarity allowed; 400-character limit.",
      "source": {
        "title": "xAI grok-prompts, ask_grok_system_prompt.j2 at commit 82a9ce7",
        "url": "https://github.com/xai-org/grok-prompts/blob/82a9ce73bcd1422d2abd899ee7340e545f729e0b/ask_grok_system_prompt.j2"
      }
    },
    {
      "product": "@grok bot, v5",
      "vendor": "xAI",
      "date": "2025-07-15",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "@grok replies on X",
      "words": 344,
      "cutoff": null,
      "notable": "Adds that responses must come from independent analysis, not from beliefs stated by past Grok, Elon Musk or xAI; restores the 450-character limit.",
      "source": {
        "title": "xAI grok-prompts, ask_grok_system_prompt.j2 at commit e517db8",
        "url": "https://github.com/xai-org/grok-prompts/blob/e517db8b4b2539ea825bc4038917740e35bcaeba/ask_grok_system_prompt.j2"
      }
    },
    {
      "product": "@grok bot, v6 (current)",
      "vendor": "xAI",
      "date": "2025-08-18",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "@grok replies on X",
      "words": 495,
      "cutoff": null,
      "notable": "Neutral tone on subjective political questions; no moralizing or snarky slogans; do not call viewpoints biased or baseless; do not rely on a single study; avoid identifying people in images unless highly confident they are widely recognized public figures; 550-character limit.",
      "source": {
        "title": "xAI grok-prompts, ask_grok_system_prompt.j2 at commit 31f21d9",
        "url": "https://github.com/xai-org/grok-prompts/blob/31f21d9330eb143b776ee0d102645723e2067c5a/ask_grok_system_prompt.j2"
      }
    },
    {
      "product": "Grok 4 chat assistant, v8 (first upload)",
      "vendor": "xAI",
      "date": "2025-07-12",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 641,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Search for a distribution of sources representing all parties; politically incorrect claims allowed if substantiated with empirical evidence; may ignore forced formats on subjective political questions.",
      "source": {
        "title": "xAI grok-prompts, grok4_system_turn_prompt_v8.j2 at commit 740797f",
        "url": "https://github.com/xai-org/grok-prompts/blob/740797f8a25f9eb29d22ec0cc6cf75c100e4aa4d/grok4_system_turn_prompt_v8.j2"
      }
    },
    {
      "product": "Grok 4 chat assistant, v8 (revision)",
      "vendor": "xAI",
      "date": "2025-07-13",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 697,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Adds that third-party web and X sources cannot be trusted on questions about Grok's own identity or preferences.",
      "source": {
        "title": "xAI grok-prompts, grok4_system_turn_prompt_v8.j2 at commit 89f59fe",
        "url": "https://github.com/xai-org/grok-prompts/blob/89f59fe78c008155e19f4c9c94d102d91e907362/grok4_system_turn_prompt_v8.j2"
      }
    },
    {
      "product": "Grok 4 chat assistant, v8 (revision)",
      "vendor": "xAI",
      "date": "2025-07-13",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 690,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Removes one politically-incorrect line from the subjective-query branch; adds that inappropriate or vulgar prior Grok posts found in search must be rejected.",
      "source": {
        "title": "xAI grok-prompts, grok4_system_turn_prompt_v8.j2 at commit db48cde",
        "url": "https://github.com/xai-org/grok-prompts/blob/db48cde818a9d739874e37cdcd13234091fc1cb0/grok4_system_turn_prompt_v8.j2"
      }
    },
    {
      "product": "Grok 4 chat assistant, v8 (revision)",
      "vendor": "xAI",
      "date": "2025-07-13",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 659,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Wording tightened: inappropriate prior Grok interactions must be rejected outright.",
      "source": {
        "title": "xAI grok-prompts, grok4_system_turn_prompt_v8.j2 at commit 9ad2adc",
        "url": "https://github.com/xai-org/grok-prompts/blob/9ad2adc9da38b4b8778a1a7f819475c43d341d1a/grok4_system_turn_prompt_v8.j2"
      }
    },
    {
      "product": "Grok 4 chat assistant, v8 (revision)",
      "vendor": "xAI",
      "date": "2025-09-02",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 1177,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Adds a Safety Instructions block with highest priority: lists disallowed activities (CSAM, weapons of mass destruction, cyberattacks), says to treat users as adults, resist jailbreaks, and not assume assistant messages are genuine.",
      "source": {
        "title": "xAI grok-prompts, grok4_system_turn_prompt_v8.j2 at commit 172d3a3",
        "url": "https://github.com/xai-org/grok-prompts/blob/172d3a3f9ce2ffeb9410c364412e6ed78207851f/grok4_system_turn_prompt_v8.j2"
      }
    },
    {
      "product": "Grok 4 chat assistant, v8 (revision)",
      "vendor": "xAI",
      "date": "2025-11-06",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 1189,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Adds a template slot for a memory prompt.",
      "source": {
        "title": "xAI grok-prompts, grok4_system_turn_prompt_v8.j2 at commit 64c662d",
        "url": "https://github.com/xai-org/grok-prompts/blob/64c662d2dda5854e1b51c1a6427442e26a29ef8f/grok4_system_turn_prompt_v8.j2"
      }
    },
    {
      "product": "Grok 4 chat assistant, v8 (current)",
      "vendor": "xAI",
      "date": "2025-11-17",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 1177,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Removes the memory slot added on November 6; otherwise the September safety-block version.",
      "source": {
        "title": "xAI grok-prompts, grok4_system_turn_prompt_v8.j2 at commit a7c186f",
        "url": "https://github.com/xai-org/grok-prompts/blob/a7c186f5ccac95875c0041aed60398f6ecb6d6c7/grok4_system_turn_prompt_v8.j2"
      }
    },
    {
      "product": "grok-4-0709 API safety prefix",
      "vendor": "xAI",
      "date": "2025-11-06",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "xAI API (injected prefix)",
      "words": 518,
      "cutoff": null,
      "notable": "Same Safety Instructions block as the Grok 4 chat prompt, injected ahead of developer prompts on the API.",
      "source": {
        "title": "xAI grok-prompts, grok_4_safety_prompt.txt at commit 64c662d",
        "url": "https://github.com/xai-org/grok-prompts/blob/64c662d2dda5854e1b51c1a6427442e26a29ef8f/grok_4_safety_prompt.txt"
      }
    },
    {
      "product": "grok-4-fast API prefix",
      "vendor": "xAI",
      "date": "2025-11-06",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "xAI API (injected prefix)",
      "words": 120,
      "cutoff": null,
      "notable": "A short policy block: refuse clear criminal intent, keep role-play from becoming realistic criminal help, short replies to jailbreaks; no restrictions on adult or offensive content unless specified.",
      "source": {
        "title": "xAI grok-prompts, grok_4_mini_system_prompt.txt at commit 64c662d",
        "url": "https://github.com/xai-org/grok-prompts/blob/64c662d2dda5854e1b51c1a6427442e26a29ef8f/grok_4_mini_system_prompt.txt"
      }
    },
    {
      "product": "grok-code-fast-1 API safety prefix",
      "vendor": "xAI",
      "date": "2025-11-06",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "xAI API (injected prefix)",
      "words": 156,
      "cutoff": null,
      "notable": "Short policy listing disallowed activities (for example CSAM, illegal weapons, cyberattacks); answer factual questions truthfully.",
      "source": {
        "title": "xAI grok-prompts, grok_4_code_rc1_safety_prompt.txt at commit 64c662d",
        "url": "https://github.com/xai-org/grok-prompts/blob/64c662d2dda5854e1b51c1a6427442e26a29ef8f/grok_4_code_rc1_safety_prompt.txt"
      }
    },
    {
      "product": "Grok 4.1 (non-thinking, with tools)",
      "vendor": "xAI",
      "date": "2025-11-17",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 1102,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "No thinking tokens allowed and a cap on function-call turns; policy block at top; same subjective-query handling as the Grok 4 prompt.",
      "source": {
        "title": "xAI grok-prompts, grok4p1_non_thinking_system_turn_prompt.j2 at commit a7c186f",
        "url": "https://github.com/xai-org/grok-prompts/blob/a7c186f5ccac95875c0041aed60398f6ecb6d6c7/grok4p1_non_thinking_system_turn_prompt.j2"
      }
    },
    {
      "product": "Grok 4.1 (non-thinking, no tools)",
      "vendor": "xAI",
      "date": "2025-11-17",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 987,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Same as the with-tools version but no function calls allowed.",
      "source": {
        "title": "xAI grok-prompts, grok4p1_non_thinking_no_tool_system_turn_prompt.j2 at commit a7c186f",
        "url": "https://github.com/xai-org/grok-prompts/blob/a7c186f5ccac95875c0041aed60398f6ecb6d6c7/grok4p1_non_thinking_no_tool_system_turn_prompt.j2"
      }
    },
    {
      "product": "Grok 4.1 (thinking), v2",
      "vendor": "xAI",
      "date": "2025-11-17",
      "kind": "Vendor-published prompt (GitHub)",
      "surface": "grok.com and X",
      "words": 1134,
      "cutoff": "None stated (says knowledge is continuously updated)",
      "notable": "Policy block says Grok is never flirtatious or playful and should briefly remind users of the truth if asked to present incorrect information.",
      "source": {
        "title": "xAI grok-prompts, grok4p1_thinking_system_turn_prompt_v2.j2 at commit a7c186f",
        "url": "https://github.com/xai-org/grok-prompts/blob/a7c186f5ccac95875c0041aed60398f6ecb6d6c7/grok4p1_thinking_system_turn_prompt_v2.j2"
      }
    },
    {
      "product": "gpt-oss-120b / gpt-oss-20b default system message",
      "vendor": "OpenAI",
      "date": "2025-08",
      "kind": "Default in open-weight chat template",
      "surface": "Self-hosted gpt-oss models",
      "words": null,
      "cutoff": "June 2024",
      "notable": "When no identity is supplied, the template says the model is ChatGPT, trained by OpenAI, adds a 2024-06 knowledge cutoff, the current date and a default medium reasoning effort. Template code, so no word count.",
      "source": {
        "title": "OpenAI, gpt-oss-120b chat_template.jinja (Hugging Face)",
        "url": "https://huggingface.co/openai/gpt-oss-120b/blob/main/chat_template.jinja"
      }
    },
    {
      "product": "Codex CLI, GPT-5-Codex prompt",
      "vendor": "OpenAI",
      "date": "2025-09-15",
      "kind": "Open-source agent prompt",
      "surface": "Codex CLI",
      "words": 1088,
      "cutoff": null,
      "notable": "Prefer rg for search; never run destructive commands such as git reset --hard unless the user asks. Last changed 2026-01-12.",
      "source": {
        "title": "OpenAI codex repo, gpt_5_codex_prompt.md",
        "url": "https://github.com/openai/codex/blob/main/codex-rs/core/gpt_5_codex_prompt.md"
      }
    },
    {
      "product": "Codex CLI, GPT-5.1 prompt",
      "vendor": "OpenAI",
      "date": "2025-11-12",
      "kind": "Open-source agent prompt",
      "surface": "Codex CLI",
      "words": 3933,
      "cutoff": null,
      "notable": "Sections on personality, the AGENTS.md convention, planning with update_plan, validating work and final-answer formatting. Last changed 2026-06-23.",
      "source": {
        "title": "OpenAI codex repo, gpt_5_1_prompt.md",
        "url": "https://github.com/openai/codex/blob/main/codex-rs/core/gpt_5_1_prompt.md"
      }
    },
    {
      "product": "Codex CLI, GPT-5.1-Codex-Max prompt",
      "vendor": "OpenAI",
      "date": "2025-11-19",
      "kind": "Open-source agent prompt",
      "surface": "Codex CLI",
      "words": 1221,
      "cutoff": null,
      "notable": "Short coding-agent prompt; the GPT-5.2-Codex file in the same repo has identical text. Last changed 2026-01-12.",
      "source": {
        "title": "OpenAI codex repo, gpt-5.1-codex-max_prompt.md",
        "url": "https://github.com/openai/codex/blob/main/codex-rs/core/gpt-5.1-codex-max_prompt.md"
      }
    },
    {
      "product": "Codex CLI, GPT-5.2 prompt",
      "vendor": "OpenAI",
      "date": "2025-12-11",
      "kind": "Open-source agent prompt",
      "surface": "Codex CLI",
      "words": 3510,
      "cutoff": null,
      "notable": "Same section structure as the GPT-5.1 prompt (autonomy and persistence, planning, apply_patch and update_plan tool rules). Last changed 2026-06-23.",
      "source": {
        "title": "OpenAI codex repo, gpt_5_2_prompt.md",
        "url": "https://github.com/openai/codex/blob/main/codex-rs/core/gpt_5_2_prompt.md"
      }
    },
    {
      "product": "Codex CLI, default base instructions",
      "vendor": "OpenAI",
      "date": "2026-01-20",
      "kind": "Open-source agent prompt",
      "surface": "Codex CLI",
      "words": 3390,
      "cutoff": null,
      "notable": "Identifies the model as a coding agent in the open-source Codex CLI; covers AGENTS.md files, planning and presenting work. Last changed 2026-06-23.",
      "source": {
        "title": "OpenAI codex repo, base_instructions/default.md",
        "url": "https://github.com/openai/codex/blob/main/codex-rs/protocol/src/prompts/base_instructions/default.md"
      }
    },
    {
      "product": "Gemini CLI system prompt (current version)",
      "vendor": "Google",
      "date": "2026-09-29",
      "kind": "Open-source agent prompt",
      "surface": "Gemini CLI",
      "words": null,
      "cutoff": null,
      "notable": "Assembled in code from sections such as Core Mandates, Primary Workflows and Operational Guidelines, with different text for interactive, plan and YOLO approval modes. Built dynamically, so no word count. Date is the last change to the snippets file.",
      "source": {
        "title": "Google, gemini-cli prompts/snippets.ts",
        "url": "https://github.com/google-gemini/gemini-cli/blob/main/packages/core/src/prompts/snippets.ts"
      }
    },
    {
      "product": "Llama 4 suggested system prompt",
      "vendor": "Meta",
      "date": "2025-04-05",
      "kind": "Recommended system prompt in model card",
      "surface": "Developers using Llama 4",
      "words": 251,
      "cutoff": "August 2024",
      "notable": "Template for developers: switch tones casually, avoid templated language, never lecture people to be nicer, avoid phrases such as \"it's important to\", do not refuse political prompts; lists 12 supported languages.",
      "source": {
        "title": "Meta, Llama 4 model card (llama-models repo)",
        "url": "https://github.com/meta-llama/llama-models/blob/main/models/llama4/MODEL_CARD.md"
      }
    },
    {
      "product": "Mistral Small 3 (2501) recommended system prompt",
      "vendor": "Mistral AI",
      "date": "2025-01-28",
      "kind": "Recommended system prompt in model repo",
      "surface": "Developers using Mistral Small",
      "words": 171,
      "cutoff": "2023-10-01",
      "notable": "Identifies the model as created by Mistral AI in Paris; resolve relative dates; ask for clarification when a request is unclear.",
      "source": {
        "title": "Mistral AI, Mistral-Small-24B-Instruct-2501 SYSTEM_PROMPT.txt",
        "url": "https://huggingface.co/mistralai/Mistral-Small-24B-Instruct-2501/blob/main/SYSTEM_PROMPT.txt"
      }
    },
    {
      "product": "Mistral Small 3.1 (2503) recommended system prompt",
      "vendor": "Mistral AI",
      "date": "2025-03-11",
      "kind": "Recommended system prompt in model repo",
      "surface": "Developers using Mistral Small",
      "words": 258,
      "cutoff": "2023-10-01",
      "notable": "Says the model powers an assistant called Le Chat; cannot browse the web; can read images but not generate them.",
      "source": {
        "title": "Mistral AI, Mistral-Small-3.1-24B-Instruct-2503 SYSTEM_PROMPT.txt",
        "url": "https://huggingface.co/mistralai/Mistral-Small-3.1-24B-Instruct-2503/blob/main/SYSTEM_PROMPT.txt"
      }
    },
    {
      "product": "Mistral Small 3.2 (2506) recommended system prompt",
      "vendor": "Mistral AI",
      "date": "2025-06-19",
      "kind": "Recommended system prompt in model repo",
      "surface": "Developers using Mistral Small",
      "words": 395,
      "cutoff": "2023-10-01",
      "notable": "Adds tool-calling instructions: use tools for up-to-date or missing data and say so if no tool is available rather than make something up.",
      "source": {
        "title": "Mistral AI, Mistral-Small-3.2-24B-Instruct-2506 SYSTEM_PROMPT.txt",
        "url": "https://huggingface.co/mistralai/Mistral-Small-3.2-24B-Instruct-2506/blob/main/SYSTEM_PROMPT.txt"
      }
    },
    {
      "product": "Devstral Small (2505) system prompt",
      "vendor": "Mistral AI",
      "date": "2025-05-12",
      "kind": "Recommended system prompt in model repo",
      "surface": "OpenHands coding agent",
      "words": 849,
      "cutoff": null,
      "notable": "Identifies the model as Devstral using the OpenHands scaffold; the July 2025 Devstral Small 2507 repo publishes the same-length prompt.",
      "source": {
        "title": "Mistral AI, Devstral-Small-2505 SYSTEM_PROMPT.txt",
        "url": "https://huggingface.co/mistralai/Devstral-Small-2505/blob/main/SYSTEM_PROMPT.txt"
      }
    },
    {
      "product": "Magistral Small (2506) system prompt",
      "vendor": "Mistral AI",
      "date": "2025-06-04",
      "kind": "Recommended system prompt in model repo",
      "surface": "Developers using Magistral",
      "words": 137,
      "cutoff": null,
      "notable": "Draft a thinking process (inner monologue) first, then write a self-contained summary as the answer.",
      "source": {
        "title": "Mistral AI, Magistral-Small-2506 SYSTEM_PROMPT.txt",
        "url": "https://huggingface.co/mistralai/Magistral-Small-2506/blob/main/SYSTEM_PROMPT.txt"
      }
    },
    {
      "product": "Magistral Small (2509) system prompt",
      "vendor": "Mistral AI",
      "date": "2025-09-12",
      "kind": "Recommended system prompt in model repo",
      "surface": "Developers using Magistral",
      "words": 89,
      "cutoff": null,
      "notable": "Shorter version: draft thinking first, format with Markdown and use LaTeX for math.",
      "source": {
        "title": "Mistral AI, Magistral-Small-2509 SYSTEM_PROMPT.txt",
        "url": "https://huggingface.co/mistralai/Magistral-Small-2509/blob/main/SYSTEM_PROMPT.txt"
      }
    },
    {
      "product": "Phi-4-reasoning required system prompt",
      "vendor": "Microsoft",
      "date": "2025-04",
      "kind": "Recommended system prompt in model card",
      "surface": "Developers using Phi-4-reasoning",
      "words": 169,
      "cutoff": null,
      "notable": "The model card says to always use this prompt: identifies the model as Phi, trained by Microsoft, and requires a Thought section followed by a Solution section.",
      "source": {
        "title": "Microsoft, Phi-4-reasoning model card (Hugging Face)",
        "url": "https://huggingface.co/microsoft/Phi-4-reasoning"
      }
    },
    {
      "product": "Qwen2.5 default system message",
      "vendor": "Alibaba Cloud (Qwen)",
      "date": "2024-09",
      "kind": "Default in open-weight chat template",
      "surface": "Self-hosted Qwen2.5 models",
      "words": 12,
      "cutoff": null,
      "notable": "One sentence: the model is Qwen, created by Alibaba Cloud, and is a helpful assistant. Inserted when no system message is given.",
      "source": {
        "title": "Qwen, Qwen2.5-7B-Instruct tokenizer_config.json (Hugging Face)",
        "url": "https://huggingface.co/Qwen/Qwen2.5-7B-Instruct/blob/main/tokenizer_config.json"
      }
    }
  ]
}