Anthropic releases official prompting guide for Claude 5.1
ethanCaballero · x · 2026-09-02
Anthropic has released official prompting documentation for Claude Fable 5.1 and Mythos 5.1. The guide covers behavioral differences and patterns including effort levels, progress updates, tool-call batching, conversation history, writing style, formatting, task completion, compaction summaries, scope, test coverage, and more, helping developers optimize model performance.
Related event: Anthropic Releases Official Prompting Guide for Claude Fable 5.1(9 posts)→
More from coding & agent
- Anthropic borrows lawyers' ethics for Claude agents that closed 186 deals with no human approval — rohanpaul_ai · 2026-10-18
- Prompt injection via email can hijack your AI agent — jev-guard adds risk-scored guards — sujingshen · 2026-10-18
- 14-Agent AI Film Pipeline on One RTX 5090: Fixing Cut Defects Between Clips — developervkmp · 2026-10-18
- Meta paper introduces "agent plasticity": best-performing agent isn't the most efficient learner — rohanpaul_ai · 2026-10-18
- Dev ships a bushfire prediction platform in a weekend with frontier models — CtrlAltDwayne · 2026-10-18
- 10 open-source GitHub repos that let AI agents control your phone, from Open-AutoGLM to mobile-use — victor_explore · 2026-10-18