{"version":"2.1.281","anchor":"thinking-cant-be-turned-off-for-models-that-reject-disabled","canonical_anchor":"thinking-cant-be-turned-off-for-models-that-reject-disabled","heading":"Thinking can't be turned off for models that reject disabled thinking","tier":"notice","area":"Models","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281\/e\/thinking-cant-be-turned-off-for-models-that-reject-disabled","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281","markdown":"### Thinking can't be turned off for models that reject disabled thinking\n\nThinking now stays on for models that do not allow it to be switched off, and `\/config` shows it locked\n\n**Unclear.** The finding does not name which models carry the `rejects_disabled_thinking` capability.\n\n**What**\n\n\"Thinking\" is the step where the model reasons before it answers. Some models are marked as not allowing thinking to be disabled (`rejects_disabled_thinking`). For those models, Claude Code now always keeps thinking on, whatever the setting says.\n\nIn `\/config`, 'Thinking mode' shows the value actually in effect and appears locked. If you try to turn it off, you get the error \"Thinking can't be turned off for this model\".\n\n**Why**\n\nBefore, the setting could say thinking was off even though that model cannot run that way. Now the setting shows what really happens, and you get a clear message instead of a setting that silently does nothing.\n\n- Area: Models\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 3\/5"}