system_prompts_leaks
asgeirtj/system_prompts_leaks
Repository for leaked system prompts of various AI chatbots including Claude, ChatGPT, Gemini.
Overview
A collection and documentation of system prompt instructions from different AI models like Anthropic's Claude Fable 5, OpenAI's GPT 5.5 Instant and Codex, Google's Gemini, and more. Updated regularly with changes in system prompts and tools associated with these models.
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Install
npm install system_prompts_leaksREADME
As seen in The Washington Post: See the hidden rules behind AI. Then use them to rewrite this article. (May 11, 2026)
System Prompts Leaks
The purpose of this repo is to document the System Prompt instructions for all the AI chatbots out there - Claude, ChatGPT, Gemini etc.
🆕 Diff: Claude Opus 4.8 → Claude Fable 5 — see exactly what changed in the claude.ai system prompt for Anthropic's newest model
Recently Updated
| What | Date | Link |
|---|---|---|
| Claude Sonnet 5 | July 1, 2026 | System prompt |
| Claude Design (Opus 4.8 — full prompt + 48 tools + 16 skills + 9 starter sources) | June 26, 2026 | System prompt |
| GitHub Copilot for macOS (app) | June 18, 2026 | System prompt |
| GPT-5.5 Codex (full prompt) | June 18, 2026 | System prompt |
| Claude Fable 5 | June 9, 2026 | System prompt · Diff vs Opus 4.8 |
| Claude Opus 4.8 | June 9, 2026 | System prompt · Official |
| Claude Code Glob & Grep tools | June 9, 2026 | Glob · Grep |
| Claude Code (Opus 4.8) | May 28, 2026 | System prompt |
| Claude Code & Cowork | May 28, 2026 | Claude Code · Cowork · Cowork Dispatch |
| GPT-5.5 | May 24, 2026 | Thinking · Instant · API · Pro API |
| Perplexity Computer | May 21, 2026 | System prompt |
| VS Code Copilot Agent | May 21, 2026 | System prompt |
| Docker Gordon AI | May 21, 2026 | System prompt |
| Gemini 3.5 Flash | May 20, 2026 | System prompt · AI Studio · Tools |
| Antigravity CLI | May 20, 2026 | System prompt |
| Zed AI | May 16, 2026 | System prompt |
| Grok Expert | May 11, 2026 | System prompt |
Anthropic — Claude
| Model | Prompt |
|---|---|
| Claude Fable 5 | System prompt |
| Claude Opus 4.8 | System prompt |
| Claude Sonnet 5 | System prompt |
| Claude Code (Opus 4.8) | System prompt |
| Claude Opus 4.7 | System prompt |
| Claude Code (Opus 4.6) | System prompt |
| Claude Opus 4.6 | System prompt |
| Claude Sonnet 4.6 | System prompt |
| Claude.ai | Anthropic Reminders |
Integrations, official prompts & older versions
| Integrations | Cowork · Cowork Dispatch · Desktop Code · [Design]( |