What probably matters to youSection of the release
What
/model switches the AI model Claude Code uses. Before a switch, Claude Code asks the server whether the model is valid. Until now, if the server answered with a 429 (a "too many requests" style refusal), the switch failed with a generic API error: … · model not changed message and was treated as an invalid model.
A 429 whose error_code is "credits_required" is now recognised and marked creditsRequired.
The interactive /model switch passes acceptCreditsRequired, telling the check it will accept that case.
If the model qualifies, validation now returns ok and keeps the refusal text as creditsRefusal. One member names the qualifying models as those whose name starts with claude-fable-, together with an account or billing check.
A model that does not qualify is still refused as before.
The findings describe the next step differently. One says the switch carries on into the normal model-confirmation step. Another says the refusal text is shown as a system message and the switch stops there without applying the model.
Why
If your plan needs credits for a certain model family, /model no longer calls that model invalid. You now see the actual reason, the credits message, instead of a generic error.
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 sinceA small documentation edit on Customize Claude Tag touched a line naming /model after this was published.Channel members can also change the model from Slack. Asking Claude in a thread switches that thread, and asking it to make a model the channel default changes this setting for the channel, unless the scope's [Channel member edits](/docs/c…claude-tag/admins/customizesee the edit
Confirmed sinceAnthropic's documentation has since written up /model, on Authentication for connectors.| `oauth_cimd` | OAuth 2.0 with [Client ID Metadata Document](https://modelcontextprotocol.io/specification/2025-11-25/basic/authorization#client-id-metadata-documents) | Supported by default |connectors/building/authenticationsee the edit
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 doubtIt is not clear which account condition applies or what the confirmation step shows.
Anthropic's documentation agreesAnthropic's documentation has since written up /model, on Authentication for connectors.
Anthropic's release notes agreeFixed earlier extended thinking being dropped when /model, /rename, /artifacts or another immediate slash command was used while Claude was…
