[Bug] Model selection defaults to Opus 4.1 when Opus 4.5 is selected

Bug Description
When I selected the Opus 4.5 model via the /model command, it allowed me to select Opus 4.5 but the result of this action is that Opus 4.1 was the one selected.

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.0.65
• Feedback ID: 24bdd6b7-f618-433f-8a3c-f2e8bf4c18b1

Errors

[{"error":"AxiosError: Request failed with status code 401\n    at Kj (file:///C:/Users/[user]/AppData/Roaming/nvm/v22.20.0/node_modules/@anthropic-ai/claude-code/cli.js:187:1137)\n    at IncomingMessage.<anonymous> (file:///C:/Users/[user]/AppData/Roaming/nvm/v22.20.0/node_modules/@anthropic-ai/claude-code/cli.js:188:9852)\n    at IncomingMessage.emit (node:events:531:35)\n    at IncomingMessage.emit (node:domain:489:12)\n    at endReadableNT (node:internal/streams/readable:1698:12)\n    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)\n    at XKA.request (file:///C:/Users/[user]/AppData/Roaming/nvm/v22.20.0/node_modules/@anthropic-ai/claude-code/cli.js:190:2130)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async t_B (file:///C:/Users/[user]/AppData/Roaming/nvm/v22.20.0/node_modules/@anthropic-ai/claude-code/cli.js:1009:47184)","timestamp":"2025-12-11T06:06:13.918Z"}]

<img width="1154" height="124" alt="Image" src="https://github.com/user-attachments/assets/21f5b791-e941-4ed5-a618-59b83b92a8db" />

then the result was:

<img width="387" height="58" alt="Image" src="https://github.com/user-attachments/assets/4ce0bbe6-0c67-4b00-81a8-6f07ea473273" />