1
→
asgeirtj/system_prompts_leaks
Extracted system prompts from Anthropic - Claude Fable 5.1, Opus 5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro, Antigravity.
About asgeirtj/system_prompts_leaks
asgeirtj/system_prompts_leaks is an open-source project on GitHub, mainly written in JavaScript. Extracted system prompts from Anthropic - Claude Fable 5.1, Opus 5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. It currently holds 67,874 stars and 11,030 forks with 55 open issues, and was last pushed on 2026-09-20 (repository created 2025-05-03).
Project Overview
Git Homed tracks it on the AI Agent Skills Trending board and on the AI AI Agent Skills Trending list.
GitHub Repository Details
README
Thanks to
---
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 | |------|------|------| | 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 | | GPT-6-Luna Codex | September 27, 2026 | GPT-6-Luna Codex system prompt | | Fable 5.1 Claude Code Desktop | September 27, 2026 | Claude Code desktop app system prompt (Fable 5.1) | | Claude Opus 5.5 | September 22, 2026 | Claude Opus 5.5 system prompt |
---
Anthropic — Claude
Claude.ai system prompts (web, desktop & mobile)
| Model | Prompt | |-------|--------| | Claude Sonnet 5.5 | Claude Sonnet 5.5 system prompt | | Claude Opus 5.5 | Claude Opus 5.5 system prompt | | Claude Fable 5.1 | Claude Fable 5.1 system prompt | | Claude Opus 5 | Claude Opus 5 system prompt | | Claude Fable 5 | Claude Fable 5 system prompt | | Claude Opus 4.8 | Claude Opus 4.8 system prompt | | Claude Sonnet 5 | Claude Sonnet 5 system prompt | | Claude Opus 4.7 | Claude Opus 4.7 system prompt | | Claude Opus 4.6 | Claude Opus 4.6 system prompt · No tools | | Claude Sonnet 4.6 | Claude Sonnet 4.6 system prompt · No tools | | Injected reminders | Claude.ai injected reminders |
Claude Code system prompts
| Component | Prompt | |-----------|--------| | Opus 5.5 Claude Code | Claude Code system prompt (Opus 5.5) | | Fable 5.1 Claude Code | Claude Code system prompt (Fable 5.1) | | Fable 5.1 Claude Code Desktop | Claude Code desktop app system prompt (Fable 5.1) · Fable 5 | | Fable 5.1 Claude Code on the web | Claude Code on the web (cloud) system prompt (Fable 5.1) | | Fable 5.1 Claude Code headless | Claude Code headless system prompt (Fable 5.1) | | Opus 5 Claude Code | Claude Code system prompt (Opus 5) | | Fable 5 Claude Code | Claude Code system prompt (Fable 5) | | Opus 4.8 Claude Code | Claude Code system prompt (Opus 4.8) | | Sonnet 5 Claude Code | Claude Code system prompt (Sonnet 5) | | Claude Code (older models) | Opus 4.7 · Opus 4.6 · Sonnet 4.6 · Haiku 4.5 | | Subagents | Claude Code subagent system prompts | | Advisor tool | Advisor tool prompts (both sides) | | Skills & commands | Claude Code skills · Slash commands | | Docs assistant | docs.claude.com assistant instructions |
Claude integrations
| Product | Prompt | |---------|--------| | Claude Projects | Claude Projects - Thread Claude system prompt | | Claude Design | Claude Design system prompt · skills · starter components | | Claude Cowork | Claude Cowork system prompt · Dispatch · setup skills | | Claude Science | Claude Science system prompt | | Claude for Microsoft 365 | Claude for Excel · Claude for Word · Claude in PowerPoint | | Claude in Chrome | Claude in Chrome extension system prompt | | Claude iOS app | Claude mobile iOS system prompt |
OpenAI — ChatGPT
| Model | Prompt | |-------|--------| | ChatGPT 5.6 Sol | ChatGPT 5.6 system prompt (Sol, extra high) | | ChatGPT 5.5 Thinking | ChatGPT 5.5 Thinking system prompt | | ChatGPT 5.5 Instant | ChatGPT 5.5 Instant system prompt | | ChatGPT 5.4 | ChatGPT 5.4 Thinking system prompt | | ChatGPT 5.3 | ChatGPT 5.3 Instant system prompt | | ChatGPT 5.2 | ChatGPT 5.2 Thinking system prompt | | ChatGPT 5 | ChatGPT 5 Thinking system prompt · Agent mode | | ChatGPT Atlas | ChatGPT Atlas system prompt | | ChatGPT 4.5 | ChatGPT 4.5 system prompt | | ChatGPT 4o | ChatGPT 4o system prompt · Deprecation preparedness | | Voice modes | ChatGPT advanced voice mode system prompt · Legacy voice mode | | ChatGPT Dots | Dreamer system prompt · Voice · Tools · Available skills · 28 skills | | Personalities | ChatGPT personality instructions | | Memory | ChatGPT advanced memory system prompt |
Codex system prompts
| Model | Prompt | |-------|--------| | GPT-6.1 Codex | GPT-6.1-Sol Codex system prompt · ChatGPT Work local | | GPT-6 Codex | GPT-6-Astra Codex system prompt · Sol · Luna · ChatGPT Work local | | GPT-5.6 Codex | Codex GPT-5.6 system prompt (Terra/Luna) | | GPT-5.5 Codex | Codex GPT-5.5 system prompt · Full prompt · Friendly · Pragmatic | | GPT-5.4 Codex | Codex GPT-5.4 system prompt · Mini | | Codex Spark | Codex Spark system prompt | | Codex modes | Plan mode · Auto-review · Computer use · Control Chrome · In-app browser | | Personas | Friendly · Pragmatic |
API-injected prompts
| Model | Prompt | |-------|--------| | GPT-5.5 | GPT-5.5 API system prompt · Pro | | GPT-5.4 / 5.3 | GPT-5.4 API · 5.3 Chat · 5.3 Codex | | o-series & older | o3 / o4-mini reasoning-effort variants |
Old models, tools & deprecated features
| Category | Prompts | |----------|---------| | Old models | GPT-4.5 · GPT-4.1 · GPT-4.1 Mini · o3 · o4-mini · GPT-5.2 Mini (free) · ChatGPT 4o Mini | | Old 4o variants | 4o WhatsApp · 4o new personality · Monday GPT | | Old tools | Canvas · Image gen · File search · Python · Web search | | Old policies | Image safety · Image safety (2026) · Automation context | | GPT-5 personalities | Listener · Nerdy · Robot | | GPT-5.1 personalities | Efficient · Professional · Nerdy | | Deprecated features | Deep research tool · Study and learn · All |
Google — Gemini
| Model | Prompt | |-------|--------| | Gemini 3.8 Flash | Gemini 3.8 Flash system prompt | | Gemini 3.1 Pro | Gemini 3.1 Pro system prompt · API | | Antigravity CLI | Antigravity CLI system prompt | | Gemini 3.7 Flash | Gemini 3.7 Flash system prompt | | Gemini 3.5 Flash | Gemini 3.5 Flash system prompt · AI Studio | | Nano / Banana 2 | Nano Banana 2 system prompt | | Google Search AI Mode | Google Search AI Mode system prompt | | Gemini CLI | Gemini CLI system prompt | | NotebookLM | NotebookLM chat system prompt | | Jules | Jules system prompt | | AI Studio Build | AI Studio Build system prompt | | Gemini 3 | Gemini 3 Flash system prompt · Gemini 3 Pro | | Gemini YouTube | Gemini YouTube system prompt | | Gemini Diffusion | Gemini Diffusion system prompt | | Gemini in Chrome | Gemini in Chrome system prompt | | Gemini Workspace | Gemini Workspace system prompt |
Older models & variants
| Model | Prompt | |-------|--------| | Gemini 2.5 Pro | API · Webapp · Guided learning | | Gemini 2.5 Flash | Image preview | | Gemini 2.0 Flash | Webapp |
SpaceXAI — Grok
| Model | Prompt | |-------|--------| | Grok 4.7 | Grok 4.7 system prompt (grok.com) · Grok CLI | | Grok 4.6 | Grok 4.6 system prompt | | Grok 4.5 | Grok 4.5 system prompt | | Grok Build | Grok Build system prompt (CLI agent) | | Grok 4.3 Beta | Grok 4.3 Beta system prompt | | Grok 4.2 | Grok 4.2 system prompt | | Grok Expert | Grok Expert system prompt | | Grok Bot | Grok Bot system prompt |
Older versions
| Model | Prompt | |-------|--------| | Grok 4.1 Beta | Grok 4.1 Beta system prompt | | Grok 4 | Grok 4 system prompt · API | | Grok 3 | Grok 3 system prompt | | Grok Account | Grok account system prompt | | Grok Personas | Grok persona prompts | | Safety Instructions | Grok safety instructions |
Meta — Muse
| Product | Prompt | |---------|--------| | Muse agent | Muse agent system prompt (Muse Spark 1.3, VM) · home dir, docs, templates · 89 skills | | Muse Code | Muse Code system prompt (Muse Spark 1.3) · skills · prompts | | Meta AI (meta.ai) | Muse Spark 1.1 system prompt · Muse Spark |
→3
→4
→5
→6
→7
→8
→