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asgeirtj/system_prompts_leaks

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Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro, Antigravity. xAI - Grok, Grok Bot, Cursor, Kimi and more! Updated regularly.

16 mentions on Hacker News by 16 people: 5 stories, 11 comments · first 2025-05-06 · latest 2026-08-16

Mentions per year 16 mentions · busiest year 2025 (9)
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  1. …Do I not know what 80% looks like? Why such a large lie (so it seems)? Claude Code prompt leaks: https://github.com/asgeirtj/system_prompts_leaks/tree/main/A... Best source I can find about the 80% reduction:…
    comment by dev-complete · 2026-08-16 · in Claude: System Prompts
  2. …all! :) Enjoy the read, have fun! https://github.com/x1xhlol/system-prompts-and-models-of-ai-t... https://github.com/asgeirtj/system_prompts_leaks https://github.com/elder-plinius/CL4R1T4S
    comment by reneberlin · 2026-07-30 · in I obtained Claude Opus 5 system prompt
  3. - https://github.com/elder-plinius/CL4R1T4S - https://github.com/asgeirtj/system_prompts_leaks
    comment by incognito124 · 2026-07-30 · in I obtained Claude Opus 5 system prompt
  4. Maybe it is because anthropic prefers a larger system prompt? https://github.com/asgeirtj/system_prompts_leaks/blob/main/A...
    comment by nurettin · 2026-07-13 · in Claude Code sends 33k tokens before reading the prompt; OpenCode sends 7k
  5. …prompts for other chat models, particularly ChatGPT, are often around this size. Here's GPT-5.4: https://github.com/asgeirtj/system_prompts_leaks/blob/main/O...
    comment by aesthesia · 2026-04-20 · in Changes in the system prompt between Claude Opus 4.6 and 4.7
  6. ▲ 1
    Extracted System Prompts from ChatGPT, Claude, Gemini, Grok, Perplexity and More
    story by beatthatflight · 2026-04-14 · 0 comments
  7. ▲ 1
    System_prompts_leaks: Anthropic/Claude-Opus-4.6.md
    story by fcpguru · 2026-04-06 · 0 comments
  8. …base model to the model spec [2] is the source of all the sophistic behavior you observe. [1] < https://github.com/asgeirtj/system_prompts_leaks/blob/main/O... > [2] < https://model-spec.openai.com/2025-02-12.html >
    comment by CompuHacker · 2025-12-26 · in ChatGPT conversations still lack timestamps after years of requests
  9. Claude's system prompt is still incredibly long and probably hurting its performance. https://github.com/asgeirtj/system_prompts_leaks/blob/main/A...
    comment by astrange · 2025-10-13 · in LLMs are getting better at character-level text manipulation
  10. …definitely seems abridged. This is the 24k tokens, unofficial Claude 3.7 system prompt (as claimed) https://github.com/asgeirtj/system_prompts_leaks/blob/main/A...
    comment by srivmo · 2025-06-05 · in Comparing Claude System Prompts Reveal Anthropic's Priorities
  11. …since it only replies via tweets. For reference here’s the current Grok the LLM system prompt: https://github.com/asgeirtj/system_prompts_leaks/blob/main/g...
    comment by M4v3R · 2025-05-15 · in LLMs get lost in multi-turn conversation
  12. ▲ 1
    Claude 3.7 system prompt with all tools
    story by tanelpoder · 2025-05-13 · 0 comments
  13. …report that this file might be more helpful it includes information on how to reproduce and more: https://github.com/asgeirtj/system_prompts_leaks/blob/main/c...
    comment by asgeirtj · 2025-05-11 · in Claude's system prompt is over 24k tokens with tools
  14. ▲ 1
    AI System Prompt Leaks
    story by justinclift · 2025-05-10 · 0 comments
  15. They renamed the file. See: https://github.com/asgeirtj/system_prompts_leaks/blob/main/c...
    comment by Quizzical4230 · 2025-05-08 · in Claude's system prompt is over 24k tokens with tools
  16. ▲ 627
    Claude's system prompt is over 24k tokens with tools
    story by mike210 · 2025-05-06 · 334 comments