[Bug] Model unavailable after usage limit reached in session

Bug Description
Fable is not available any longer after I had to stop work in a session, since I hit my usage limits. Also after (re)selecting the mode with /model

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.1.175
• Feedback ID: ec514901-6ed5-4f55-81c5-4b2d3ac37744

Errors

[{"error":"Error: 404 {\"type\":\"error\",\"error\":{\"type\":\"not_found_error\",\"message\":\"Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011CbzYVcpdKoSNBv8Bz2gte\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:66510)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T03:24:26.861Z"},{"error":"Error: 404 {\"type\":\"error\",\"error\":{\"type\":\"not_found_error\",\"message\":\"Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011CbzZNsrvxyrBtZiwvz7u6\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:66510)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T03:36:02.299Z"}]