[Bug] Anthropic API Error: Invalid Model in Tool Definition (tools.10.model)

Bug Description
api error 400 tools.10.model

Environment Info

• Platform: linux
• Terminal: gnome-terminal
• Version: 2.1.177
• Feedback ID: 1b0b8324-299b-4519-8918-6bf83cf2c55f

Errors

[{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.10.model: Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011Cc1JBLkrp7Ge94x6am5sb\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67433)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T12:57:18.872Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.10.model: Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011Cc1JDziSLZB6vv5X4jYtL\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67433)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T12:57:54.863Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.10.model: Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011Cc1JEZJFgjh1UV6VYij2L\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67433)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T12:58:02.516Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.10.model: Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011Cc1JFETDEhUCkcWbKcceo\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67433)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T12:58:11.644Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.10.model: Claude Fable 5 is not available. Please use Opus 4.8. Learn more: https://www.anthropic.com/news/fable-mythos-access\"},\"request_id\":\"req_011Cc1JJ69UmW8P7zB495P9t\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:12:67433)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:52:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-13T12:58:50.415Z"}]