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claude-code - 💡(How to fix) Fix [Bug] Anthropic API Error: System role not supported on model

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Error Message

[{"error":"Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"role 'system' is not supported on this model"},"request_id":"req_011CbHNeYKgu4eucRaFLvvNg"}\n at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:30:57.856Z"},{"error":"Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"role 'system' is not supported on this model"},"request_id":"req_011CbHNfzU5mzznnCNqsPjv3"}\n at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:31:17.661Z"},{"error":"Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"role 'system' is not supported on this model"},"request_id":"req_011CbHNkrPoBUWPxahmZVn18"}\n at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:32:23.502Z"}]

Code Example

[{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"role 'system' is not supported on this model\"},\"request_id\":\"req_011CbHNeYKgu4eucRaFLvvNg\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:30:57.856Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"role 'system' is not supported on this model\"},\"request_id\":\"req_011CbHNfzU5mzznnCNqsPjv3\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:31:17.661Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"role 'system' is not supported on this model\"},\"request_id\":\"req_011CbHNkrPoBUWPxahmZVn18\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:32:23.502Z"}]
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Bug Description ⎿ API Error: 400 role 'system' is not supported on this model

Environment Info

  • Platform: darwin
  • Terminal: iTerm.app
  • Version: 2.1.140
  • Feedback ID: 8616d8d1-31c4-469c-a194-9bf1021d9d92

Errors

[{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"role 'system' is not supported on this model\"},\"request_id\":\"req_011CbHNeYKgu4eucRaFLvvNg\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:30:57.856Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"role 'system' is not supported on this model\"},\"request_id\":\"req_011CbHNfzU5mzznnCNqsPjv3\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:31:17.661Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"role 'system' is not supported on this model\"},\"request_id\":\"req_011CbHNkrPoBUWPxahmZVn18\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:59486)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-22T09:32:23.502Z"}]

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