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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.302 ·

claude-opus-5 joins a model list used in a capability check

Claude Code now lists claude-opus-5 alongside other models in a list that one of its checks looks at

Under the hood Internal Changes
JSON All of v2.1.302
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
ModelsArea: what it touches
Internal ChangesKind: in v2.1.302,
What probably matters to youSection of the release

Unclear Which feature or behaviour this check controls is not stated.

What

Claude Code has a list of models that one of its checks looks at. A new version of that list adds claude-opus-5 to the existing models. The check gives a yes when the model in use is not on the list, so claude-opus-5 now gives a no.

Why

Opus 5 is now treated the same way as the other listed models for this check.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhich feature or behaviour this check controls is not stated.

See this entry in the whole of v2.1.302 →

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