Claude Fable 5 scores 210/210 on a bar exam benchmark for about $6
ctjlewis · x · 2026-07-22
Claude Fable 5 hits 210/210 on a bar exam benchmark
Matthew Stubenberg says Anthropic’s Claude Fable 5 became the first model to score perfectly on 210 MBE bar exam practice questions in his benchmark.
- The run cost about $6 in API tokens.
- It averaged roughly 10 seconds per question.
- Stubenberg notes the benchmark started in November 2022, when ChatGPT 3.5 was around 50% on the same set.
- His chart shows a steady climb toward perfect scores, with Fable 5 reaching 100%.
He frames it as evidence of how fast model performance on professional exams has improved in just over three years.
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