System Prompts Leaks
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,…
Install
git clone https://github.com/asgeirtj/system_prompts_leaksInstall command taken from the project's README or registry entry. Always review code before running it.
README excerpt
Read full README on GitHub →Thanks to
Open Source Agent Analytics
Understand your agents in production
System Prompts Leaks
The full verbatim system prompts behind the most popular chatbots in the world. Carefully curated and complete. Feel free to open up a PR or get in contact if you got a different result.
The Washington Post built its interactive story on prompts from this repo: See the hidden rules behind AI. Then use them to rewrite this article. (May 11, 2026)
CEPS' AI World built an interactive breakdown of what is inside system prompts, topic by topic, from this repo's files: System prompts and what they tell us about the chat before the chat (July 10, 2026)
Simon Willison calls it "the most thorough leaked system prompt collection I know of": ChatGPT search now uses the site: operator at scale (August 20, 2026)
Most recent additions/changes
| What | Date | Link |
|---|---|---|
| Claude artifact types (Slides, Dashboard, Design, Docs) | October 9, 2026 | Slides · Dashboard · Design · Design System · Docs · all types |
| Claude Haiku 5.5 | October 7, 2026 | Claude Haiku 5.5 system prompt |
| Haiku 5.5 Claude Code | October 7, 2026 | Claude Code system prompt (Haiku 5.5) |
| ChatGPT Dots | October 5, 2026 | Dreamer system prompt · Voice · all prompts · skills |
| Muse Spark 1.3 Muse Code | October 4, 2026 | Muse Code system prompt (Muse Spark 1.3) · skills · prompts |
| Meta Muse agent (VM files) | October 3, 2026 | Muse agent system prompt · all VM files |
| Grok 4.7 | October 3, 2026 | Grok 4.7 system prompt (grok.com) |
| Fable 5.1 Claude Code on the web (cloud) | September 30, 2026 | Claude Code on the web system prompt (Fable 5.1) |
| GPT-6.1-Sol Codex | September 29, 2026 | GPT-6.1-Sol Codex system prompt · ChatGPT Work local |
| Claude Sonnet 5.5 | September 29, 2026 | Claude Sonnet 5.5 system prompt |
| Sonnet 5.5 Claude Code | September 29, 2026 | Claude Code system prompt (Sonnet 5.5) |
| GPT-6-Sol Codex | September 27, 2026 | GPT-6-Sol Codex system prompt |
Anthropic — Claude
Claude.ai system prompts (web, desktop & mobile)
Similar plugs
CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies
Bash is all you need - A nano claude code–like 「agent harness」, built from 0 to 1
Wrap Antigravity, ChatGPT Codex, Claude Code, Grok Build, Muse Code, Devin as an OpenAI/Gemini/Claude/Codex compatible API service, allowing you to enjoy the free Gemini…
