Benchmark1 Sep 2026 00:00 UTC · 28d ago

Epoch AI evaluates Claude Fable 5.1

FrontierMath-Tiers-1-3-v2-Private 90.2% · FrontierMath-Tier-4-v2-Private 87.8% · OTIS Mock AIME 2024-2025 100.0% · SimpleQA Verified 70.8%

Type: BENCHMARK_RESULT
Detection: benchmark
Confidence: high
Status

Related entities

ModelClaude Fable 5.1 CompanyAnthropic

Primary source

Epoch AI Benchmarking Hub · epoch.ai/benchmarks ↗

Independent benchmark runs (GPQA Diamond, SWE-bench Verified, FrontierMath, ...) plus externally reported leaderboards and the Epoch Capabilities Index (ECI).

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