[BUG] Fable 5 usage-credits gate blocks session while weekly usage limit shows plenty of headroom (Pro plan)

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?

Claude Code blocked continued use of Fable 5 mid-session, showing a dialog that the "usage credits" balance is €0.01 and usage credits are turned off — while the account's own Usage settings page in claude.ai shows the Fable weekly limit only 18% used, with an active promotional increase still in effect. These two indicators contradict each other.

What Should Happen?

Expected behavior

If the weekly Fable limit is at 18% usage with a +50% promotional increase active, Claude Code should not gate the session behind an unrelated "usage credits: €0.01, turned off" message without explaining how that balance relates to the weekly quota still showing headroom.

Error Messages/Logs

Actual behavior

Session is blocked with a credits-exhausted message that appears inconsistent with the weekly limit shown in the account dashboard, forcing a model downgrade (Sonnet 5) to continue.

Steps to Reproduce

1. In Claude Code, have Fable 5 active as the model.
2. Continue sending messages in an ongoing session.
3. Claude Code interrupts with:

Fable 5 now uses usage credits — you have €0.01 in credits. Usage credits are turned off. Re-enable to use Fable 5.
with options: (1) Set up usage credits on claude.ai, (2) Switch to Sonnet 5 and continue.

1. At the same time, in claude.ai → Settings → Usage (Límites de uso del plan, Pro):

• Current session: 4% used (resets in 4h32m)
• All models (weekly): 13% used (resets Sun 2:00 a.m.)
• Fable (weekly): 18% used (resets Sun 2:00 a.m.)
• Banner: "Your limits are temporarily increased — Claude Code weekly limit +50% until Aug 19, Cowork limit +100% until Aug 5."

Claude Model

_No response_

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

v2.1.215

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

<img width="1546" height="947" alt="Image" src="https://github.com/user-attachments/assets/e80fabe5-0fa2-46a9-b66e-65cc9281e3b2" />