{"version":"2.1.281","anchor":"model-catalogue-entry-now-requires-21280-and-drops-always","canonical_anchor":"model-catalogue-entry-now-requires-21280-and-drops-always","heading":"Built-in model entry no longer forces thinking on and needs 2.1.280","tier":"notice","area":"Models","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281\/e\/model-catalogue-entry-now-requires-21280-and-drops-always","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281","markdown":"### Built-in model entry no longer forces thinking on and needs 2.1.280\n\nOne model in the bundled model selector config drops always_on thinking and now requires Claude Code 2.1.280\n\n**Unclear.** The finding does not name the model this entry describes.\n\n**What**\n\nClaude Code ships with a built-in list of models, the `model_selector_config`, that feeds the model picker. It includes entries such as `claude-fable-5-1`. One entry in it changed. That entry has a `hard_limit` of 950000 and supports fast mode.\n\n- Its thinking option loses `always_on: !0`.\n\n- It gains `min_claude_code_version: \"2.1.280\"`. Other entries carried `\"2.1.251\"`.\n\n- It gains `voice_model: \"claude-opus-5\"`.\n\nThinking is the step-by-step reasoning a model can do before it answers.\n\n**Why**\n\nIn practice, thinking is no longer forced on for that model's picker entry, and the entry only applies to Claude Code 2.1.280 or later.\n\n- Area: Models\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 3\/5"}