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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.

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Claude Code v2.1.222

Model refusal fallback no longer claims your session model changed

You'll notice
Useful4 Signal0
Models

Fallback notices now say only that one response came from another model; your session model is unchanged.

/status
What

When a request falls back to another model, the notice explains that only that response came from the other model, and the session model display marks the switch as automatic.

Details
  • The old "Switched to X" wording is gone; the notice now says the response was generated or completed by the other model and that the session model is unchanged.
  • /status and the model display append a note that the model was automatically switched.
  • The fallback notice is carried into the extracted last-assistant-response text with a ⚠ prefix.
Evidence

This response was generated by ${n} instead. Your session model is unchanged.

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 v2.1.222 →