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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 v2.1.182

Legacy Model Remapping — Clearer Warning and Opt-Out

When Claude Code automatically remaps a deprecated model ID to a current one, the warning now includes the model name being used and mentions the opt-out env var:

Before: ⚠ Claude Opus 4.7 has been updated to claude-opus-4-8.

After: ⚠ claude-opus-4-7 is automatically remapped to Claude Opus 4.8 (claude-opus-4-8). Set CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP=1 to keep the requested model.

Also, the status-line model indicator now shows the same opt-out hint in shortened form: ⚠ Opus 4.7 remaps to Claude Opus 4.8. CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP=1 opts out.

Evidence

Modified DCo() and new lzn() functions — search for "is automatically remapped to" and "CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP=1 opts out"

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 v2.1.182 →