[BUG] macOS v2.0.36: Opus unavailable for Claude Pro despite working on Linux/WSL with same account

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?

Bug Description

Claude Pro subscription cannot access Opus 4.5 on macOS, but the same account works perfectly on Linux/WSL. This
contradicts official marketing materials claiming "Claude Code is included in your Pro plan...with access to both
Sonnet 4.5 and Opus 4.5."

What Should Happen?

## Expected Behavior

Both systems should have identical model access since they use the same Claude Pro subscription. Official marketing
states Pro plan includes "access to both Sonnet 4.5 and Opus 4.5" in Claude Code.

## Actual Behavior

macOS incorrectly restricts Opus access while Linux/WSL allows it with the identical subscription.

Error Messages/Logs

Invalid model. Claude Pro users are not currently able to use Opus in Claude Code.

Steps to Reproduce

## Steps to Reproduce

On macOS:

1. Run /model command
2. Only see sonnet and haiku options
3. Try /model opus
4. Receive error: "Invalid model. Claude Pro users are not currently able to use Opus in Claude Code."

On Linux/WSL (same account):

1. Run /model command
2. See opus option available
3. Can successfully use Opus 4.5

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.36 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

## Environment Information

macOS System:

• OS: macOS 15.6.1 (Build 24G90)
• Architecture: Apple Silicon (arm64)
• Claude Code Version: 2.0.36
• Subscription: Claude Pro
• Result: ❌ Opus unavailable

Linux/WSL System (work computer):

• OS: Linux/WSL2
• Claude Code Version: 2.0.36 (latest)
• Subscription: Same Claude Pro account
• Result: ✅ Opus works perfectly