Claude Code carries a signed catalog, a built-in list of the models it knows about. That catalog moves from version 837 to version 994, issued at 2026-09-22T19:22:16Z. The build reports itself as version 2.1.281, built at 2026-09-23T02:22:43Z. The other changes in the build are renamed internal names with no change in behaviour.
Why
The list of models Claude Code knows about out of the box now matches the newer catalog.
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 doubtThe finding does not say which models were added, removed or changed between catalog versions 837 and 994.
