{"version":"2.1.321","anchor":"fable-51-model-pick-migrated-to-the-fable-alias-with-a-d","canonical_anchor":"fable-51-model-pick-migrated-to-the-fable-alias-with-a-d","heading":"Fable 5.1 model choices are moved to the fable alias at startup","tier":"notice","area":"Models","scope":"individual","heads_up":true,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.321\/e\/fable-51-model-pick-migrated-to-the-fable-alias-with-a-d","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.321","markdown":"### Fable 5.1 model choices are moved to the `fable` alias at startup\n\nIf your saved model is Fable 5.1, Claude Code switches it to the `fable` alias, with a delayed move for team and enterprise organisations\n\n**What**\n\nWhen Claude Code starts, it now checks your saved model setting. If it is `claude-fable-5-1` or `claude-fable-5-1[1m]`, Claude Code changes it to the `fable` alias. An alias is a short name that always points to the current Fable model rather than one fixed version. A similar startup step used to do this for `claude-fable-5`.\n\nThe move is skipped when:\n\n- you use a third-party provider, set either through environment variables or through how you sign in\n\n- the `fable` alias is not allowed for you\n\nTeam and enterprise organisations get a second, delayed move. It waits until the organisation is entitled to the `fable` alias, gives up after 14 days, and does nothing at all after 15 December 2026. This delayed move is on by default in the code unless it is switched off remotely.\n\n**Why**\n\nIf you pinned Fable 5.1 on purpose, your choice is changed without a prompt and will follow the alias from then on. Check your model setting if you want to stay on a specific version.\n\n- Flag `tengu_amber_thistle`: Not enough to say (read for one account on one subscription tier against v2.1.321; this account: no value returned, anonymous baseline: no value returned, compiled default: on) These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.\n- Area: Models\n- Names: `fable`, `claude-fable-5-1`\n- Tier: You'll notice\n- Useful: 3\/5\n- Signal: 3\/5\n- Scope: individual\n- Heads-up: yes"}