First-party users who have Fable 5 available see a one-time "Fable 5 is here!" announcement at session start, replacing the old Opus 4.8 announcement.
- For users on Fable 5: "Fable 5 is here! Our newest model for complex, long-running work"
- For users not yet on Fable 5 but with access to the picker: "Meet Fable 5, our newest model for complex, long-running work. Try anytime with /model."
- If the account uses plan limits and the plan-limits end date is in the future: "Included in your plan limits until [date], then switch to usage credits to continue."
- Controlled by the
tengu_saffron_latticefeature flag (fields:enabled,planLimitsEndDate,hideRateLimitsDescription) - Shown once; suppressed after first view via
tengu_fable5_launch_showntelemetry event
Announcement component and feature flag (search for "Fable 5 is here!" and "tengu_saffron_lattice")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
tengu_saffron_lattice Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.170: not a boolean we can read
These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.
Read once, for one account on one subscription tier, against v2.1.170. It isn't a statement about your account. What a flag value here can and cannot tell you
A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
New in this build: tengu_saffron_lattice