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 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 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 | Cowork · Cowork Dispatch · Desktop Code · Design · Mobile iOS · In Chrome · For Excel · For Word · In PowerPoint · Default Styles |
| Claude Code extras | Glob tool · Grep tool · Deferred tools · Docs assistant · Bundled skills |
Published (claude_behavior at release date, not updated) |
Opus 4.8 · Opus 4.7 · Opus 4.6 · Sonnet 4.6 · All versions |
| Without tools | Opus 4.6 · Sonnet 4.6 |
| Raw prompts | Opus 4.6 · Opus 4.6 (no tools) · Sonnet 4.6 · Sonnet 4.6 (no tools) |
| Visualize | Visualization |
| Opus 4.5 | System prompt |
| Sonnet 4.5 | System prompt |
| Sonnet 4 | System prompt |
| Opus 4.1 Thinking | System prompt |
| Sonnet 3.7 | System prompt · With tools · Full w/ tools · Human-readable |
OpenAI — ChatGPT
| Model | Prompt |
|---|---|
| GPT-5.5 | Thinking · Instant · API · Pro API · Codex · Friendly · Pragmatic |
| GPT-5.4 | API · Thinking · Codex · Codex Mini |
| GPT-5.3 | Codex · Spark · Codex API · Chat API · Instant |
| Codex CLI | Per-model prompts · Spark · Plan mode · Personas · Auto-review |
| Tools | Web search · Deep research · Python · Python code · Canvas · Image gen · Memory · Advanced memory · File search |
| Policies | Image safety · Automation context |
| GPT-5.2 | Mini (free) · Thinking · Codex |
| o4-mini | System prompt · High |
| o3 | System prompt |
| ChatGPT Atlas | System prompt |
| GPT-5.1 personalities | Default · Friendly · Professional · Candid · Cynical · Efficient · Nerdy · Quirky |
| GPT-5 | Agent mode · Thinking · Cynic · Listener · Nerdy · Robot · Codex · Codex Mini |
| GPT-4.5 | System prompt |
| GPT-4.1 | Full · Mini |
| GPT-4o | System prompt · WhatsApp · Advanced voice · Legacy voice |
| Monday GPT | System prompt |
| GPT-4o new personality | System prompt |
| Study and learn | System prompt |
| Image safety policies | System prompt |
| API variants | GPT-5 reasoning (high) · o3 high · o3 med · o3 low · o4-mini high · o4-mini med · [o4-mini low](OpenAI/API/o |