**Bug Description** Same issue on Claude Code 2.1.289 (Windows 11), Max 5x plan, usage credits $0.00. /usage at the same time: Current week (all models) 75%, Current week (Fable) 47%. Observations (2026-10-05): 1. In-session `/model` → Fable 5.1 (both `claude-fable-5-1` and `claude-fable-5-1[1m]`): "Fable 5.1 runs on usage credits — you have $0.00 in credits." 2. Interactive launch `claude --model claude-fable-5-1`: blocked at startup with "Fable 5.1 now uses usage credits … You don't have usa

[Bug] Claude Code interactive mode incorrectly blocks Fable 5.1 access despite sufficient plan quota

Status Open

Reported on v2.1.289

Maintainer reply None cached

Activity 0 comments · opened Oct 5, 2026

Bug Description
Same issue on Claude Code 2.1.289 (Windows 11), Max 5x plan, usage credits $0.00.

/usage at the same time: Current week (all models) 75%, Current week (Fable) 47%.

Observations (2026-10-05):

In-session /model → Fable 5.1 (both claude-fable-5-1 and claude-fable-5-1[1m]): "Fable 5.1 runs on usage credits — you have $0.00 in credits."
Interactive launch claude --model claude-fable-5-1: blocked at startup with "Fable 5.1 now uses usage credits … You don't have usage credits yet." Only options: switch to Opus 5.5, or set up usage credits.
Headless claude -p --model claude-fable-5-1 --output-format json "reply OK" succeeds twice (~15 min apart, same time window as #2): exit 0, is_error=false, modelUsage contains only claude-fable-5-1, with $0.00 credits.
Agent tool subagent with model: "fable" (main session on Opus) silently runs claude-opus-5-5 (transcript "model" field), no warning.

So the server serves Fable 5.1 on this Max plan; the interactive client-side gate wrongly requires usage credits.

Environment Info