10 pages for max_thinking_tokens.

Agent SDK reference - Python Claude Code CLI · in the page agent-sdk/python …plugins: list[SdkPluginConfig] = field(default_factory=list) max_thinking_tokens: int | None = None # Deprecated: use thinking instead thinking: ThinkingConfig | None = None effort:… Claude Code changelog Claude Code CLI · in the page changelog …rs refuse relayed permission requests, and auto mode blocks them * `MAX_THINKING_TOKENS=0`, `--thinking disabled`, and the per-model thinking toggle now disable thinking on models that think by defa… Manage costs effectively Claude Code CLI · in the page costs …ning-and-fixed-thinking-budgets), lowering the budget by setting the `MAX_THINKING_TOKENS` [environment variable](/docs/en/env-vars), for example `MAX_THINKING_TOKENS=8000`. Adaptive-reasoning models… Desktop application Claude Code CLI · in the page desktop …easoning tasks but uses additional tokens. On the Anthropic API, set `MAX_THINKING_TOKENS` to `0` in the local environment editor to turn thinking off; this has no effect on Fable 5, which always uses… Environment variables Claude Code CLI · in the page env-vars …Sonnet 4.6 and fall back to the fixed thinking budget controlled by `MAX_THINKING_TOKENS`. Has no effect on Fable 5, Sonnet 5, or Opus 4.7 and later, which always use adaptive reasoning… Error reference Claude Code CLI · in the page errors …this error on Amazon Bedrock or Google Cloud's Agent Platform when [`MAX_THINKING_TOKENS`](/docs/en/env-vars) is set higher than the provider's output limit, or when plan mode raises the thinking bud… Glossary Claude Code CLI · in the page glossary …with the [effort level](#effort-level), or cap thinking tokens with `MAX_THINKING_TOKENS` on models with a fixed thinking budget. Thinking appears in gray italic text in the terminal. Learn more: [U… Model configuration Claude Code CLI · in the page model-config …ING=1` to revert to the previous fixed thinking budget controlled by `MAX_THINKING_TOKENS`. See [environment variables](/docs/en/env-vars). ### Extended thinking Extended thinking is the reasoning C… Claude Code settings Claude Code CLI · in the page settings …ing directly. To force thinking off regardless of this setting, set [`MAX_THINKING_TOKENS=0`](/docs/en/env-vars) in `env`, which disables thinking on the Anthropic API except on Fable 5, which cannot… Claude Code settings reference Claude Code CLI · in the page settings-reference …nking is on for models that support it * **Per-session overrides**: [`MAX_THINKING_TOKENS`](/docs/en/env-vars) takes precedence over this key for one session: `0` turns thinking off, under the same mo…