Unclear It is not clear what Claude Code uses for the model list after rejecting the stale one.
What
Claude Code gets its list of available models from a published catalog. When it has to fall back to the copy built into the program, it now checks each model family first, such as the family a name like Opus belongs to. If the built-in copy points a family at a different model than this version of Claude Code does, the whole list is rejected as stale.
Why
This stops an outdated built-in list from offering older model choices than the ones this version expects.
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The writer flagged doubt
It is not clear what Claude Code uses for the model list after rejecting the stale one.