CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING
Updated by Alex Sorokoletov
CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING is a Claude Code environment variable: Disable adaptive thinking mode. Present since v2.1.69 or earlier and still present in v2.1.294. It is listed in the official reference.
| Status | Present in v2.1.294 |
|---|---|
| Added | Present since v2.1.69 or earlier |
| Category | Models and thinking |
| Official docs | Listed |
How to set it
For one session, export it in the shell that starts Claude Code:
export CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING=<value>
claudeTo apply it to every session, add it to the env object of a settings file:
// ~/.claude/settings.json
{
"env": {
"CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING": "<value>"
}
}Release notes that mention it
Related variables
CLAUDE_CODE_DISABLE_THINKING: Completely disable extended thinking.DISABLE_INTERLEAVED_THINKING: Interleaved thinking beta.CLAUDE_CODE_DISABLE_FAST_MODE: Disable the /fast toggle that uses the same model with faster output.CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAPCLAUDE_CODE_DISABLE_MODEL_ACCESS_FALLBACK: Present in the v2.1.285 build and absent from that release's notes.CLAUDE_CODE_DISABLE_UNKNOWN_MODEL_WINDOW_ENFORCEMENTCLAUDE_CODE_THINKING_DISPLAY_UPDATES: Overrides whether Claude's in-progress thinking and connector text render during a turn.DISABLE_PROMPT_CACHING_FABLE
Frequently asked questions
What does CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING do?
Disable adaptive thinking mode
Which Claude Code version has CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING?
Present since v2.1.69 or earlier and still present in v2.1.294.
How do I set CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING?
Export it before starting Claude Code (export CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.
All variables, searchable: Claude Code environment variables.