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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.238 Home All releases olderv2.1.237 v2.1.239newer
Claude Code v2.1.238

Model picker names both models when a session override is in place

You'll notice
Useful3 Signal2
Models

The model picker now names both your session model and configured model when they differ.

What

When you have a session-scoped model on top of a different configured one, the picker now names both and says the pick replaces both, instead of saying the session model will be undone. Models not otherwise in the list appear as extra entries labelled "Current model" and "Base model".

Details
  • The effort you choose in the picker is now applied as the session's effort rather than written to effortLevel in your user settings, so it does not outlive the session.
  • The notice is built at runtime around the two model names; the fixed part is "). Selecting a model here replaces both."
Evidence

). Selecting a model here replaces both.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.238 →