CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING
- Entity ID:
ent-20260419-b8c9d0e1f2a3 - Type:
concept - Scope:
shared - Status:
active - Aliases: disable-adaptive-thinking env, adaptive-thinking kill switch
Description
Environment variable confirmed by Boris Cherny as the interim workaround for the zero-reasoning adaptive thinking bug. When set to '1', forces a fixed high reasoning budget instead of letting the model decide per-turn reasoning allocation. Key fix for fabrication-on-zero-budget turns introduced by the Opus 4.6 (Feb 9, 2026) switch from fixed thinking budgets to adaptive thinking default.
Key claims
- Cybench is fully saturated at 100% pass@1 on Mythos
Relations
- CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING --[fixed]--> GitHub Issue #42796
- CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING --[contains]--> Two-Version Output Efficiency Directive