{"version":"2.1.301","anchor":"model-family-helper-lists-earlier-same-family-model-versions","canonical_anchor":"model-family-helper-lists-earlier-same-family-model-versions","heading":"Claude Code can now list earlier models in the same family","tier":"internal","area":"Models","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.301\/e\/model-family-helper-lists-earlier-same-family-model-versions","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.301","markdown":"### Claude Code can now list earlier models in the same family\n\nClaude Code now works out the earlier Sonnet, Opus or Haiku versions of the same family as a given model\n\n**What**\n\nGiven a model name, Claude Code now strips the version number from the end to find its family (Sonnet, Opus or Haiku). It then lists the earlier model IDs from Anthropic's own API that belong to that same family.\n\n**Why**\n\nThis could let Claude Code fall back to an older version of the same model family.\n\n- Area: Models\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 3\/5\n- Scope: individual\n- Heads-up: no"}