r/ClaudeAI: Fable + Ultracode Mode Consumed Full 5-Hour Usage Limit in 7 Minutes via Codebase-Wide Audit Prompt — Uncovered Real Bugs but Token Cost Is Extreme

A developer on the Claude Max plan reports that combining Fable with ultracode mode and a full-codebase audit prompt burned through an entire 5-hour usage allocation in approximately 7 minutes. The approach proved effective — surfacing bugs and regressions missed during the 4.6→4.7→4.8 model upgrade cycle — but the token consumption rate makes unsupervised audit loops economically impractical on any fixed-usage plan. The post adds to growing community evidence that Fable 5 with high-effort settings carries significantly higher per-session token costs than previous Claude generations.