Nothing to try yet Notable
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A new Fable model family is wired into the picker but gated behind an entitlement check.
The model picker adds a "Fable" model family, listed with the description "Fable 5.1 · ...". Internally it references claude-fable- model identifiers and is gated by a new entitlement probe, fableEntitlementProbe.
Names in the bundlefableEntitlementProbe