[Bug] Sonnet 4.6 default model incorrectly requires extra usage for 1M context

Bug Description
Getting an error with choosing sonnet - telling me I need extra usage for 1M context even when just choosing the default model: ?? docs/prototypes/survey-redesign-v3/heating-matrix-spike.png ⎿ API Error: Extra usage is required for 1M context · run /extra-usage to enable, or /model to switch to standard context ✻ Baked for 0s This conversation is cached for the current model. Switching to Opus 4.7 means the full history gets re-read on your next message. ❯ 1. Yes, switch to Opus 4.7 2. No, go back ⎿ Set model to Sonnet 4.6 (default) with high effort ❯ cont ⎿ API Error: Extra usage is required for 1M context · run /extra-usage to enable, or /model to switch to standard context ✻ Baked for 0s

Environment Info

• Platform: darwin
• Terminal: cursor
• Version: 2.1.140
• Feedback ID: 0afa8036-917a-4311-a3c3-b8d32c0593de

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/damiansligo-green/.local/share/claude/versions/2.1.140 (expected in multi-process scenarios)\n    at g16 (/$bunfs/root/src/entrypoints/cli.js:2672:2257)\n    at RLH (/$bunfs/root/src/entrypoints/cli.js:2672:1337)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-13T22:26:32.820Z"},{"error":"Error: Failed to delete keychain entry: security: SecKeychainSearchCopyNext: The specified item could not be found in the keychain.\n    at Jgq (/$bunfs/root/src/entrypoints/cli.js:245:289181)\n    at async YY9 (/$bunfs/root/src/entrypoints/cli.js:401:898)\n    at async A_8 (/$bunfs/root/src/entrypoints/cli.js:401:796)\n    at async rj_ (/$bunfs/root/src/entrypoints/cli.js:2648:2388)\n    at async VLH (/$bunfs/root/src/entrypoints/cli.js:2674:6149)\n    at async <anonymous> (/$bunfs/root/src/entrypoints/cli.js:2699:3468)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-13T22:27:52.088Z"},{"error":"Error: ENAMETOOLONG: name too long, open\n    at readFileSync (unknown)\n    at readFileBytesSync (/$bunfs/root/src/entrypoints/cli.js:56:1085)\n    at LI9 (/$bunfs/root/src/entrypoints/cli.js:574:15938)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:628:170)\n    at map (native:1:11)\n    at f (/$bunfs/root/src/entrypoints/cli.js:628:161)\n    at X (/$bunfs/root/src/entrypoints/cli.js:629:305)\n    at gI1 (/$bunfs/root/src/entrypoints/cli.js:498:1976)\n    at dispatch (/$bunfs/root/src/entrypoints/cli.js:498:2652)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:491:111939)","timestamp":"2026-05-13T22:29:02.363Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"Extra usage is required for long context requests.\"},\"request_id\":\"req_011Cb1MhmfHNtnQdrjLyjhNh\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59708)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-13T22:29:04.563Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"Extra usage is required for long context requests.\"},\"request_id\":\"req_011Cb1MiJEoBpXYdHq8oMMkc\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59708)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-13T22:29:11.672Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"Extra usage is required for long context requests.\"},\"request_id\":\"req_011Cb1MjnBLmYhiiHaNNdJhu\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59708)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-13T22:29:31.777Z"}]