Source Intelligence

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 v2.1.251 Home All releases olderv2.1.250
Claude Code v2.1.251

Fewer redundant model-switch notices

You'll notice
Useful3 Signal2
Model Switching

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

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 →