[Bug] Fable 5 incorrectly requires usage credits on Max 20x plan despite available weekly allowance

[imwes-CCW]

Bug Description
Title: Max 20x forced to usage credits for Fable 5 despite unused Fable weekly allowance

What happened
On a Max 20x plan, Claude Code auto-switched off Fable 5 mid-session with:
"Switched to Opus 4.8 (1M context) for this session · Fable 5 requires usage credits · /model to change"

Why this looks wrong
Per the July 18 announcement, Fable 5 is included in Max plans at 50% of weekly
limits starting July 20. My usage is nowhere near any cap:
Current session: 3% used
Current week (all models): 2% used
Current week (Fable): 4% used
The dedicated "Current week (Fable)" bar exists and is nearly empty, which
indicates plan-limit access to Fable should be active for this account.

Reproduction

1. /model fable (plain alias, no [1m] suffix)
2. Result: "Kept model as Opus 4.8 (1M context)" — the selection does not stick.
   Same result selecting Fable 5 from the /model picker.

Account state (from ~/.claude.json)
organizationRateLimitTier: default_claude_max_20x
billingType: stripe_subscription
hasExtraUsageEnabled: false
planLimitsEndDate: 2026-07-20T07:00:00Z

Timing
First observed 2026-07-20 ~07:16 UTC, roughly 16 minutes after the
planLimitsEndDate timestamp above.

Expected
Fable 5 selectable and usable on Max, drawing from the plan's Fable weekly
allowance, without requiring usage credits to be enabled.

Environment Info

• Platform: win32
• Terminal: vscode
• Version: 2.1.215
• Feedback ID: afe640f5-5852-4ca4-92d4-573414560968

Errors

[]

[anwac]

same on MacOS - same timing around 00:00 PDT July 20th.
feedback ID: 726a9b73-587d-4899-a38f-affd29c26b9f

not sure if it got fixed in the last 10 or if this is related:
I happened to be in the claude code "Your login expires in 3 days · run /login to renew" state.
logging in got me into the "hey a new user" track (scary ;-) but it found my account after all, and did onboarding=1 in the url ...
the claude code login link required yet another sign-in, but once I got logged in in claude code, I had fable access again.
or it was just CDN rollout, or who knows. TL;DR Things didn't work for me, now they do.

[dkasper26]

Duplicate report from my side: #79378. Same symptom, similar timing (2026-07-20), also on a plan well under all quota limits:

Current session:           3% used
Current week (all models): 26% used
Current week (Fable):      24% used

Model switches between Fable 5 and Sonnet 5 (via /model) did not clear the credits-required condition within the session either. Closing my report as a duplicate of this one — consolidating here since this one already has more detail on the likely root cause.

[mtodescato]

It is also for Team premium seat subscription, Fable available in claude.ai but claude code asks for usage credits

[marcindulak]

See #79345 (comment).

[Jampire]

Incident report is saying to restart Claude Code. This didn't work for me. I had to run /logout and login again.