What probably matters to youSection of the release
A new advisor option, Fable 5.1, can be reviewed and enabled by running /model fable (in an interactive terminal session if needed), after which it can be set as the advisor.
Read from
Names in the bundle/model fable
Since it was published
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.
Confirmed sinceAnthropic's documentation has since written up /model fable, on Communications kit.| Fable | The hardest, longest-running tasks. Opt-in only: select it with `/model fable`. Cybersecurity or biology content triggers [automatic model fallback to Opus](/docs/en/model-config#automatic-model-fallback) |communications-kitsee the edit
How sure we are
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up /model fable, on Communications kit.
Anthropic's release notes agreeFixed the /model picker not showing Fable 5.1 for organizations that can use it, which was only accepted when typed as /model…
