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[GitHub Trending] asgeirtj/system_prompts_leaks

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Leaked system prompts from major AI models offer deep insight into agent design

AI/ML github.com
Extracted system prompts from Anthropic - Claude Fable 5, Opus 4.8, Claude Code, Claude Design. OpenAI - ChatGPT 5.5 Thinking, GPT 5.5 Instant, Codex. Google - Gemini 3.5 Flash, 3.1 Pro, Antigravit...
Summary

A GitHub repo by asgeirtj called system_prompts_leaks catalogs and diffs the system prompts of major AI chatbots (Claude, ChatGPT, Gemini) across model versions — including Claude Opus 4.8 to Fable 5, GPT-5.5 Codex, and tools like GitHub Copilot for macOS. It provides transparency into the hidden rules governing AI behavior, tracking changes with diffs and links to exact prompts. The collection also covers integrations, API variants, and published behaviors (e.g., claude_behavior) for dozens of model releases.

Author

asgeirtj