[BUG] Fable 5 shows "Currently unavailable" on Pro plan (Windows 11)

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?

Fable 5 appears as "Currently unavailable" in the model selector despite having a Pro plan.

• OS: Windows 11
• Claude Code version: latest (just updated via npm update -g)
• Plan: Pro
• Other models (Opus 4.8, Sonnet 4.6, Haiku 4.5) work fine

What Should Happen?

Fable 5 appears as "Currently unavailable" in the model selector despite having a Pro plan.

• OS: Windows 11
• Claude Code version: latest (just updated via npm update -g)
• Plan: Pro
• Other models (Opus 4.8, Sonnet 4.6, Haiku 4.5) work fine

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code desktop app
2. Click on the model selector
3. Click "More models"
4. Fable 5 appears as "Currently unavailable"

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.177 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_