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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 ·

Workflow-spawned agents resolve their own model before inheriting

Workflow-spawned agents resolve a model themselves before falling back to the main one.

Under the hood New Features
JSON All of v2.1.251
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
WorkflowsArea: what it touches
New FeaturesKind: in v2.1.251,
New FeaturesSection of the release
What

An agent started by a workflow used to always take the main loop's model when none was given. It now consults a model resolution step first and only falls back to the main loop model when that step says "inherit". An explicit model on the call still wins.

Details
  • What the resolution step reads, and so what makes it return something other than "inherit", is not visible in the shipped code.
Evidence

N !== "inherit" ? N : F.options.mainLoopModel

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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