{"version":"2.1.257","anchor":"fable-51-model-introduced","canonical_anchor":"fable-51-model-introduced","heading":"Fable 5.1 model introduced","tier":"soon","area":"Models","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.257\/e\/fable-51-model-introduced","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.257","markdown":"### Fable 5.1 model introduced\n\nA claude-fable-5-1 model id is recognized and becomes the fable family default, with UI text updated to Fable 5.1.\n\nA new `claude-fable-5-1` model id is recognized, along with a matching `claude-mythos-5-1` variant. The fable family's default, best, and latest_per_family selections now point to `claude-fable-5-1`, though a gateway-specific override still uses `claude-fable-5`. UI text changes from \"Fable 5\" to \"Fable 5.1\".\n\n- Area: Models\n- Names: `claude-fable-5-1`, `claude-mythos-5-1`\n- Tier: Nothing to try yet\n- Useful: 5\/5\n- Signal: 5\/5\n- Present in the build but not switched on"}