Adaptive Thinking Official Documentation
- Entity ID:
ent-20260419-a001b23c0015 - Type:
document - Scope:
shared - Status:
active - Aliases: adaptive thinking docs, platform.claude.com adaptive thinking
Description
Official Anthropic documentation (platform.claude.com/docs/en/build-with-claude/adaptive-thinking) published after the HackerNews regression thread. Confirms design: Claude Opus 4.6 and Sonnet 4.6 use adaptive thinking as default; Mythos Preview has adaptive thinking always-on with no opt-out (effort is unset and model auto-applies). Adaptive thinking is SUPPOSED to allocate zero reasoning on simple turns — the bug is it allocates zero on turns involving 3rd-party API versions, exact hashes, package names where hallucination risk is high. CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING=1 switches to fixed effort=high (pre-February behavior).
Key claims
- Adaptive Thinking Zero-Budget Bug is Mechanically Explained by Design
Relations
- Adaptive Thinking Official Documentation --[summarizes]--> GitHub Issue #42796