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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.301 ·

Claude Code can now list earlier models in the same family

Claude Code now works out the earlier Sonnet, Opus or Haiku versions of the same family as a given model

Under the hood Internal Changes
JSON All of v2.1.301
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
ModelsArea: what it touches
Internal ChangesKind: in v2.1.301,
Internal ChangesSection of the release
What

Given 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.

Why

This could let Claude Code fall back to an older version of the same model family.

See this entry in the whole of v2.1.301 →

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