{"version":"2.1.257","anchor":"new-model-catalog-fallbackmapping-error-message-for-unrecog","canonical_anchor":"new-model-catalog-fallbackmapping-error-message-for-unrecog","heading":"New model-catalog fallback\/mapping error message for unrecognized models","tier":"notice","area":"Model Catalog","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.257\/e\/new-model-catalog-fallbackmapping-error-message-for-unrecog","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.257","markdown":"### New model-catalog fallback\/mapping error message for unrecognized models\n\nAn unrecognized model id now produces an error telling you to update or map it with behavesAs or modelOverrides.\n\nA new internal helper generates the error shown when a model id isn't described by the current build's model catalog, telling the user to update Claude Code or map the model via `behavesAs`\/`modelOverrides`. This is part of a reworked served model catalog system that also handles masking, family-spelling verdicts, and `behavesAs` lookups for resolving models unknown to the client.\n\n- Area: Model Catalog\n- Names: `behavesAs`, `modelOverrides`\n- Tier: You'll notice\n- Useful: 3\/5\n- Signal: 3\/5"}