Inference
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12 Nov
2026
Benchmarks
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Anthropic STEM Professor Bench
Anthropic STEM Professor Bench
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Reasoning
Models
?
Models with a result.
3
Top result
?
Best result on this benchmark.
—
Top-3 spread
?
Points from first to third.
—
Year
?
Year of release.
—
Results
3 results
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#
Model
Result
?
The score from the source.
—
Claude Fable 5.2
61.8
%
—
Claude Opus 5.5
53.7
%
—
Claude Fable 5.1
29.9
%