error when changing models in session

[bigwest60]

Describe the bug

I started copilot cli with a model flag (--model="get-5-mini"). During the interactive session, I changed to Sonnet-4.6. However, copilot continued to use gpt-5-mini and not sonnet-4.6. This was reflected when I issued the /usage command.

Affected version

GitHub Copilot CLI 1.0.5.

Steps to reproduce the behavior

1. From terminal, type "copilot --model="got-5-mini"
2. In copilot interactive mode, type "/model claude-sonnet-4"
3. perform some action (i.e. How many files are in this project")
4. after getting response, type "/usage"
5. notice that there were no premium requests issued even though Claude-sonnet-4.6 is the selected model

Expected behavior

Expected that "/usage" would have shown 1 premium request made

Additional context

No response