Invalid Model Name Length in Anthropic API Request

Resolved 💬 3 comments Opened Aug 13, 2025 by Lorry1010 Closed Jan 3, 2026

Bug Description
hallo
⎿ API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"model: String should have at most 256 characters"}}\
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I get this error messae although im on subscription max plan

Environment Info

  • Platform: win32
  • Terminal: cursor
  • Version: 1.0.77
  • Feedback ID: d4f2a727-30d2-4c45-b2ec-d746f62fac93

Errors

[{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"model: String should have at most 256 characters\"}}\n    at Z6.generate (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:936:2303)\n    at QS.makeStatusError (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:953:2101)\n    at QS.makeRequest (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:953:5315)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async W$0 (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:969:6936)\n    at async qSB (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1861:401)\n    at async Object.call (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1856:976)\n    at async mv (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2132:367)\n    at async DL0 (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2303:7373)\n    at async file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2303:2940","timestamp":"2025-08-13T11:16:59.174Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"model: String should have at most 256 characters\"}}\n    at Z6.generate (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:936:2303)\n    at QS.makeStatusError (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:953:2101)\n    at QS.makeRequest (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:953:5315)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async WPB.hG1.showErrors (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:24691)\n    at async hG1 (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:13705)\n    at async WPB (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:24542)\n    at async file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:19524\n    at async VN0 (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:5164)\n    at async t11 (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:19494)","timestamp":"2025-08-13T11:16:59.831Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"model: String should have at most 256 characters\"}}\n    at Z6.generate (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:936:2303)\n    at QS.makeStatusError (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:953:2101)\n    at QS.makeRequest (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:953:5315)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async WPB.hG1.showErrors (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:24691)\n    at async hG1 (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:13705)\n    at async WPB (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:24542)\n    at async file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:19524\n    at async VN0 (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:5164)\n    at async t11 (file:///C:/Users/lorry/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1809:19494)","timestamp":"2025-08-13T11:17:23.894Z"}]

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