ApprenticeBench puts Claude at 72%

ApprenticeBench’s September 11 snapshot puts Claude Fable 5.1 at 72% success across 100 sequential accounts-payable bills, ahead of GPT-6 Astra at 68%, according to the benchmark leaderboard. The best human tester reached 51% at an estimated $7.21 per task, while Claude’s leading GUI run cost $18.23; each score also bundles a model, harness, interface, memory strategy, and one non-resettable pass. Treat this as a workflow receipt—not a general model ranking—until independent tasks and repeated trials exist, using agent-evaluation governance to keep the comparison honest.