BBH: BIG-Bench Hard
23 challenging tasks from BIG-Bench where even large models scored below human performance without chain-of-thought. Tests logical deduction, causal judgment, and formal fallacies. High benchmark score alone doesn't make a model the right pick — weigh it against pricing, API availability, and release date.
Models ranked
1
tracked on this benchmark
Score band
83.2 – 83.2
best → lowest tracked
Snapshot trend
—
need ≥2 snapshots
Leaderboard
Tracked models ranked by Accuracy (higher is better).
How to read this benchmark
This benchmark scores models where higher is better. Scores are useful for directional filtering and shortlisting — not for universal quality ranking. Prefer benchmarks closest to your workload, then validate the linked model pages for pricing, context window, and provider availability.
Trust this score when
- There is a fresh timestamped snapshot (or multiple snapshots) for this benchmark.
- The model list covers the same version family you can actually deploy today.
- Top candidates overlap with your required routing and feature requirements.
Be cautious when
- There is only one benchmark snapshot or the dataset appears stale.
- The benchmark metric direction is opposite of your decision objective.
- The score difference between options is narrow and likely within implementation variance.
FAQ
What does the BBH benchmark measure?
23 challenging tasks from BIG-Bench where even large models scored below human performance without chain-of-thought. Tests logical deduction, causal judgment, and formal fallacies. On this page it lists 1 tracked model variant where higher is better.
Is a higher BIG-Bench Hard score always better?
For this benchmark, higher is better. A high score helps you shortlist, but confirm pricing, context window, and provider availability on each model page before committing — the top scorer is not always the right pick for your workload or budget.
How current is this BIG-Bench Hard data?
This benchmark was last reviewed on Apr 15, 2026. Re-check the linked model pages for the freshest provider and pricing detail.
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Last reviewed: Apr 15, 2026