[Bug] Anthropic API Error: Invalid or inaccessible model claude-fable-5

Bug Description
Error: Error during compaction: There's an issue with the selected model (claude-fable-5[1m]). 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: 2.1.170
• Feedback ID: e6e3924a-8e4c-4825-810c-b3145c250697

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_011CbzSxRNMa7EuHVYW6ZgnB\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:68217)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:11:49.647Z"},{"error":"Error: Error during compaction: There's an issue with the selected model (claude-fable-5[1m]). It may not exist or you may not have access to it. Run /model to pick a different model.\n    at ZG3 (/$bunfs/root/src/entrypoints/cli.js:7469:1646)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:11:49.651Z"},{"error":"Error: 404 {\"type\":\"error\",\"error\":{\"type\":\"not_found_error\",\"message\":\"Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011CbzSywD17Abz7koGkrbDF\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:68217)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:12:11.676Z"},{"error":"Error: Error during compaction: There's an issue with the selected model (claude-fable-5[1m]). It may not exist or you may not have access to it. Run /model to pick a different model.\n    at ZG3 (/$bunfs/root/src/entrypoints/cli.js:7469:1646)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:12:11.677Z"},{"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_011CbzT1VDcnJEA3vZQWUEhK\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:68217)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:12:33.425Z"},{"error":"Error: Error during compaction: There's an issue with the selected model (claude-fable-5[1m]). It may not exist or you may not have access to it. Run /model to pick a different model.\n    at ZG3 (/$bunfs/root/src/entrypoints/cli.js:7469:1646)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:12:33.426Z"},{"error":"Error: 404 {\"type\":\"error\",\"error\":{\"type\":\"not_found_error\",\"message\":\"Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011CbzT2GALKFYnouQqzxgA1\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:68217)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:12:42.828Z"},{"error":"Error: 404 {\"type\":\"error\",\"error\":{\"type\":\"not_found_error\",\"message\":\"Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011CbzTEonvwYczcSYSVLD2W\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:68217)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:15:32.793Z"},{"error":"Error: 404 {\"type\":\"error\",\"error\":{\"type\":\"not_found_error\",\"message\":\"Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011CbzTNeJuD2CYt7dKh7US2\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:68217)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:17:19.310Z"},{"error":"Error: Error during compaction: There's an issue with the selected model (claude-fable-5[1m]). It may not exist or you may not have access to it. Run /model to pick a different model.\n    at ZG3 (/$bunfs/root/src/entrypoints/cli.js:7469:1646)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T02:17:19.312Z"},{"error":"Error: 404 {\"type\":\"error\",\"…

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