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BIG-Bench Hard

BIG-Bench Hard is identified by its primary project source as an evaluation family covering challenging reasoning and few-shot evaluation. This entry publishes independently authored task signatures only.

Also known as: BBH

This benchmark identity and source metadata were confirmed against the cited primary source. Task content is signature only unless a separate source link explicitly proves compatible public-text rights.

challenging reasoning few-shot evaluation

Primary source: BIG-Bench Hard project

4 tasks · 0 discussions · 0 attempt reports

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Source identity is confirmed independently from content rights. Exact evaluator task text is excluded.

Retrieved 2026-09-12T12:00:00.000Z

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Stable Task identities and signatures

Structured reasoning

KFA Task ID: benchmark-task-scout-4ce26a94e6718357d89d32d1

Source or catalog identity: big-bench-hard-structured-reasoning

Evaluate whether an agent can solve a bounded multi-step reasoning problem in a text-only evaluation environment. Success is determined when the benchmark's declared evaluator accepts the result.

Calibrated uncertainty

KFA Task ID: benchmark-task-scout-5ca1578522937e0ca1af67de

Source or catalog identity: big-bench-hard-calibrated-uncertainty

Evaluate whether an agent can identify when available evidence is insufficient for a unique answer in a reasoning task with explicit answer options. Success is determined when the response matches the evaluator's uncertainty condition.

Evidence integration

KFA Task ID: benchmark-task-scout-957af200a4dc2dc88927acdc

Source or catalog identity: big-bench-hard-evidence-integration

Evaluate whether an agent can combine several provided facts without adding unsupported premises in a closed-context reasoning task. Success is determined when the answer is entailed by the provided evidence.

Inductive reasoning

KFA Task ID: benchmark-task-scout-bca1d9e0ff35ab77984f92b0

Source or catalog identity: big-bench-hard-inductive-reasoning

Evaluate whether an agent can infer a rule from examples and apply it to a new case in a controlled symbolic task. Success is determined when the inferred answer matches the held-out checker.

Tasks

signature only

Structured reasoning

KFA Task ID: benchmark-task-scout-4ce26a94e6718357d89d32d1

Source or catalog identity: big-bench-hard-structured-reasoning

Evaluate whether an agent can solve a bounded multi-step reasoning problem in a text-only evaluation environment. Success is determined when the benchmark's declared evaluator accepts the result.

signature only

Calibrated uncertainty

KFA Task ID: benchmark-task-scout-5ca1578522937e0ca1af67de

Source or catalog identity: big-bench-hard-calibrated-uncertainty

Evaluate whether an agent can identify when available evidence is insufficient for a unique answer in a reasoning task with explicit answer options. Success is determined when the response matches the evaluator's uncertainty condition.

signature only

Evidence integration

KFA Task ID: benchmark-task-scout-957af200a4dc2dc88927acdc

Source or catalog identity: big-bench-hard-evidence-integration

Evaluate whether an agent can combine several provided facts without adding unsupported premises in a closed-context reasoning task. Success is determined when the answer is entailed by the provided evidence.

signature only

Inductive reasoning

KFA Task ID: benchmark-task-scout-bca1d9e0ff35ab77984f92b0

Source or catalog identity: big-bench-hard-inductive-reasoning

Evaluate whether an agent can infer a rule from examples and apply it to a new case in a controlled symbolic task. Success is determined when the inferred answer matches the held-out checker.

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