Benchmark definition
AI2 Reasoning Challenge (ARC)
A 7,787-question grade-school science benchmark partitioned into Easy and Challenge sets.
Applicability does not mean evaluated; benchmark result/model score data is outside this UI contract.
About
- Description
- ARC evaluates science question answering using authentic grade-school multiple-choice questions and a large related science corpus.
- What it measures
- Science knowledge and reasoning on grade-school examination questions.
- Comparison guidance
- Not published
- Intended difficulty
- Not published
Not recorded for this benchmark: what it does not measure, why it matters, motivation, gap addressed.
Classification
- Categories
- Science reasoningKnowledge
- Domains
- Science
- Evaluation style
- Automatic reference matchStatic Q&A
Structure
2 components. Applicability can differ between them.
Components
- EasySubsetEasier ARC partition.
- ChallengeSubsetQuestions missed by both retrieval and word co-occurrence baselines; represented separately because it is independently reported.
Tasks
Metrics
What a result on this benchmark would be reported as. ctxdex does not carry results.
| Metric | Role | Direction | Unit |
|---|---|---|---|
Accuracy | Primary | Higher is better | Percent |
Methodology
None recorded
Evaluation environment
What the benchmark's harness provides and allows. These are properties of the environment, not model requirements, and applicability does not test for them.
- Interaction
None. Static prompts and answers.
- Evaluation style
- Automatic reference match, Static Q&A
- Environment summary
- Not published
Model requirements
Required conditions decide applicability. Relevant ones describe what the benchmark exercises and decide nothing.
Required · decides applicability
Relevant · informational
CTXDEX models
30 of the 58 active, preview, experimental models meet this benchmark’s recorded requirements, at some scope. Applicable means the requirements are met, not that the model was evaluated.
View all 30 applicable models →- Applicable · full
- 30
- Applicable · components
- 0
- Applicable · scenarios
- 0
- Conditionally applicable
- 0
- Not recorded
- 28
Counted over 58 models in the default lifecycle scope (active, preview, experimental).
Every required condition, for the whole benchmark, is recorded as supported. Each line is one recorded condition and why it counts.
Every one of the 2 required conditions is recorded as supported.
MODALITY:INPUT:TEXTthe catalogue records SUPPORTED for TEXT (input)MODALITY:OUTPUT:TEXTthe catalogue records SUPPORTED for TEXT (output)
Every one of the 2 required conditions is recorded as supported.
MODALITY:INPUT:TEXTthe catalogue records SUPPORTED for TEXT (input)MODALITY:OUTPUT:TEXTthe catalogue records SUPPORTED for TEXT (output)
Applicability/relevance ordering only; never a performance ranking.
Scale
- 7,787QuestionTotal · Exact
Data and access
- Dataset
- Open
- Evaluation code
- Open source
- Unknown
- Leaderboard, Peer review, Maintenance
Coverage
- Languages, regions
None recorded
- Coverage summary
- Not published
Limitations
None recorded
Lineage
- Family
- FamilyAI2 Reasoning Challenge
- Related
- Other definitions in family
- ARC-Challenge ActiveARC-DA Active
- Changes
None recorded
Sources
- ARC paper ↗Research paper · Original creator
- Ai2 ARC data page ↗Official website · Benchmark official
Freshness
- Content version
- 1.0
- Last reviewed
- 2026-09-22
- Refresh model
- Static
- Time sensitivity
- Low
- Benchmark data
- c40cccac878af5d0
13 contract fields are empty for every benchmark in this release and are not shown: applicability groups, conditional requirements, feature requirements, model relevance domains, required capabilities, openness summary, reference artifacts, interaction protocols, tool protocols, benchmark last major refresh at, short name, target expertise level, target population.