[Bug] Anthropic API Error: Invalid or Inaccessible Model claude-fable-5

Bug Description
⏺ There's an issue with the selected model (claude-fable-5). It may not exist or you may not have access to it. Run /model to pick a different model.

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.176
• Feedback ID: 46bb8dd9-668f-4114-93fe-5e06d0135efc

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_011CbzRzhVfPy6yesub42QVa\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67578)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T01:59:13.506Z"},{"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_011CbzS5Jo3oGGd9bacMgTSn\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67578)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:00:15.994Z"},{"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_011CbzSF7btHEq3wVTtvE5Na\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67578)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:02:29.268Z"},{"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_011CbzSJesQSTpmdu8wtMqgU\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67578)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:03:17.329Z"}]