{"version":"2.1.248","anchor":"opus-5-fable-and-mythos-in-the-version-and-alias-tables","canonical_anchor":"opus-5-fable-and-mythos-in-the-version-and-alias-tables","heading":"Opus 5, Fable and Mythos in the version and alias tables","tier":"soon","area":"Models","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248\/e\/opus-5-fable-and-mythos-in-the-version-and-alias-tables","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248","markdown":"### Opus 5, Fable and Mythos in the version and alias tables\n\nNaming tables list Opus 4.8, Sonnet 5, Fable 5 and Mythos 5 with aliases.\n\n**What**\n\nThe family and version table now lists opus 4.8, sonnet 5, fable 5 and mythos 5; display names gain \"Fable\"; and aliases map `fable-5`, `mythos-5` and `opus-5` to full ids. These are naming tables, not availability. Two task-model maps in the same build disagree, one selecting Opus 5 where the other selects Opus 4.8.\n\n**Evidence**\n\n`[\"fable-5\", \"claude-fable-5\"]`\n\n- Area: Models\n- Tier: Nothing to try yet\n- Useful: 3\/5\n- Signal: 5\/5\n- Present in the build but not switched on"}