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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 subagents now always resolve a model

Workflow subagents now resolve a model on every step rather than only when one is named.

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

The helper that used to stand in for "inherit the parent's model" now returns nothing at all. Because a workflow step's model check compares against that sentinel, the check is now effectively always true, so workflow subagents resolve and pass through a model selection on every step rather than only when a step names one explicitly.

Details
  • Previously the step fired only if it carried its own model override.
  • No flag guards this; it is a hardcoded change in behaviour.
Evidence

`function Xo() {

return; }`

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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