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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Fewer redundant model-switch notices

You get fewer pointless "model changed" notices when the switch isn't meaningful.

You'll notice New Features
JSON All of v2.1.251
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Model SwitchingArea: what it touches
New FeaturesKind: in v2.1.251,
New FeaturesSection of the release
What

When the model changes mid-session, the notice shown to you is now suppressed unless the switch is actually meaningful, comparing the new model's alias and family, and any stepped-down variant of it, against both the previous model and the conversation's model.

Details
  • Switches within the same family no longer produce a breadcrumb.
  • Always on.
Evidence

conversationModel

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.251 →

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