You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ModelsArea: what it touches
ImprovementsKind: in v2.1.315,
ImprovementsSection of the release
What
When you pick a model that this version of Claude Code does not know about, the message now reads "Requires Claude Code v or later", with the version filled in. Before, it said the model was not described by this version's model catalog and suggested updating Claude Code or mapping the model with behavesAs.
Why
The message is shorter and tells you which version to update to.
