What
A new message tells the user that their current version of Claude Code is too old, states the minimum version now required, and tells them to run claude update.
Why
This makes clear why Claude Code has stopped working and gives the exact command to fix it, instead of leaving the user to guess what to do.
Names in the bundleclaude update
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Added since
A small documentation edit on Model configuration touched a line naming claude update after this was published.
Sonnet 5.5 requires Claude Code v2.1.284 or later, and Opus 5.5 requires v2.1.280 or later. If a request for one of them from an older version fails, see [Claude Code does not support this model](/docs/en/errors#claude-code-does-not-suppor…model-config see the edit
Confirmed since
Anthropic's documentation has since written up claude update, on Claude Code changelog.
* Fixed update checks erroring every 30 minutes, and `claude update` hanging when a minimum or maximum version is set, if a proxy returns an invalid version; a malformed `minimumVersion` is now ignoredchangelog see the edit
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agrees
Anthropic's documentation has since written up claude update, on Claude Code changelog.