Burned a Claude Max quota on Fable 5.1: 1.3M tokens, 2,260 tool calls
sprakes_ · reddit · 2026-09-02
The author exhausted a Claude Max quota (1.32M output tokens) in 8 hours to stress-test Fable 5.1's coding capabilities.
Key Takeaways:
- The model excels at interpreting intent and implementing solutions, outperforming Fable 5.
- Successfully handled complex tasks in a well-architected legacy codebase, including data stream tracing, test classification, and debugging flaky parallel tests.
- Resolved multiple P1 backlogged tasks in a single session.
Technical Context:
- Performance was boosted by a well-designed codebase and a maintained 40k character AGENTS.md knowledge base.
- The session involved 2,260 tool calls, including 1,694 shell invocations.
Stats:
- 51 sessions, 1,192 turns total.
- 1.32M output tokens (698k reasoning).
- 118.6M cached read tokens.
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