{"version":"2.1.170","anchor":"fable-5-launch-announcement-banner","canonical_anchor":"fable-5-launch-announcement-banner","heading":"Fable 5 Launch Announcement Banner","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.170\/e\/fable-5-launch-announcement-banner","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.170","markdown":"### Fable 5 Launch Announcement Banner\n\n**What**\n\nFirst-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.\n\n**Details**\n\n- For users on Fable 5: \"Fable 5 is here! Our newest model for complex, long-running work\"\n- 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.\"\n- 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.\"\n- Controlled by the `tengu_saffron_lattice` feature flag (fields: `enabled`, `planLimitsEndDate`, `hideRateLimitsDescription`)\n- Shown once; suppressed after first view via `tengu_fable5_launch_shown` telemetry event\n\n**Evidence**\n\nAnnouncement component and feature flag (search for `\"Fable 5 is here!\"` and `\"tengu_saffron_lattice\"`)\n\n- Flag `tengu_saffron_lattice`: Not enough to say (read for one account on one subscription tier against v2.1.170; this account: no value returned, anonymous baseline: no value returned, compiled default: 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."}