Model Selection Mismatch Preventing Claude Code Execution

Bug Description
claude code won't let me work because it incorrectly assumes i'm using Opus 4 model instead of Sonnet 4 model

Environment Info

• Platform: win32
• Terminal: vscode
• Version: 1.0.57
• Feedback ID: 602207e3-0e01-4cb7-affb-1a2d7d104f72

Errors

[{"error":"Error: ENOENT: no such file or directory, open 'G:\\proc\\version'\n    at Module.readFileSync (node:fs:435:20)\n    at Object.readFileSync (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:659:7096)\n    at file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:659:8658\n    at Q (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:653:14408)\n    at __4 (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:753:63371)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-07-22T22:05:36.682Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"system: Invalid model name\"}}\n    at M4.generate (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1293:6428)\n    at CO.makeStatusError (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1310:2101)\n    at CO.makeRequest (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:1310:5315)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async HTB.h31.showErrors (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2718:14157)\n    at async h31 (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2255:2035)\n    at async HTB (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2718:14008)\n    at async file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2718:9065\n    at async NU0 (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2718:1626)\n    at async Zo (file:///C:/Users/skytr/AppData/Roaming/npm/node_modules/@anthropic-ai/claude-code/cli.js:2718:9035)","timestamp":"2025-07-22T22:09:56.828Z"}]