[BUG] Max plan defaults to Sonnet despite 5% usage (should use Opus 4.5 up to 20%)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

aI'm subscribed to the Max plan, but Claude Code is defaulting to Sonnet 4.5 instead of Opus 4.5.

According to the documentation, Max plan users should see:
"Opus 4.5 for up to 20% of usage limits, then use Sonnet"

However, when I run /usage, it shows I'm only at 5% usage (just reset today), but the default model is still showing as Sonnet instead of Opus.

This appears to be similar to issue #6831, but that was filed 5 months ago for Opus 4.1. This is happening now with Opus 4.5 / Sonnet 4.5.

What Should Happen?

aSince I'm on the Max plan and only at 5% usage, the default model should be Opus 4.5.

The model selector should display:
"Opus 4.5 for up to 20% of usage limits, then use Sonnet"

Opus 4.5 should be the default model until I reach 20% of my weekly usage limit.

Error Messages/Logs

Steps to Reproduce

a1. Have an active Max plan subscription

1. Open Claude Code CLI (version 2.1.1)
2. 3. Run /usage command to check current usage
3. 4. Observe that usage is at 5% (weekly limit just reset)
4. 5. Run /model command to check available models
5. 6. Observe that the default model is showing as "Sonnet 4.5 for daily use" instead of "Opus 4.5 for up to 20% of usage limits, then use Sonnet"

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.1 (Claude Code)

Platform

Other

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_