Dataset Management With Task Splits And Difficulty Stratification

Comprehensive code benchmark — 1,140 practical tasks with real library usage beyond HumanEval.

Unique: Provides two orthogonal task splits (Complete vs Instruct) and difficulty subsets (full vs hard) allowing researchers to evaluate models on matched task distributions, rather than forcing all models through identical task sets regardless of architecture

vs others: More flexible than single-task-set benchmarks because it enables fair comparison between base models (Complete split) and instruction-tuned models (Instruct split) without contaminating results with mismatched task formats

via “multi-domain reasoning task stratification”

23 hardest BIG-Bench tasks where models initially failed.

Unique: Explicitly stratifies tasks by reasoning modality (algorithmic, arithmetic, logical, causal, spatial) rather than treating all hard tasks as monolithic, enabling domain-specific capability assessment. This structure allows researchers to correlate model architecture choices with specific reasoning strengths.

vs others: More analytically useful than generic hard task collections because stratification enables root-cause analysis of reasoning failures; more focused than full BIG-Bench which lacks explicit domain organization.

via “difficulty-calibrated-problem-stratification”

13K competitive programming problems from AlphaCode research.

Unique: Uses empirical runtime metrics (median and 95th percentile from real submissions) to calibrate difficulty rather than subjective classification or problem setter ratings. This grounds difficulty in measurable performance data and enables reproducible difficulty-based dataset splits.

vs others: More objective than subjective difficulty labels (e.g., 'hard' vs 'medium') and more granular than binary easy/hard splits, enabling fine-grained curriculum learning studies that other datasets don't support.

via “difficulty-stratified problem categorization and filtering”

10K coding problems across 3 difficulty levels with test suites.

Unique: Explicitly stratifies problems into three difficulty tiers with substantial size per tier (3.6K, 5K, 1.4K), enabling fine-grained analysis of model performance degradation across skill levels rather than treating all problems as equal difficulty

vs others: Unlike HumanEval which lacks difficulty stratification, APPS enables researchers to measure whether models have genuine reasoning or are pattern-matching, by comparing performance across tiers

via “difficulty-stratified problem sampling and filtering”

12.5K competition math problems across 7 subjects and 5 difficulty levels.

Unique: Pre-assigned difficulty metadata (1-5 scale) from competition context enables efficient filtering without re-evaluation, unlike datasets where difficulty must be computed post-hoc. Difficulty labels are grounded in actual competition difficulty (AMC problems are easier, AIME problems are harder), providing meaningful stratification.

vs others: More efficient than datasets requiring dynamic difficulty estimation because filtering is O(1) lookup on metadata; more reliable than model-specific difficulty metrics because it uses competition-grounded labels that generalize across model architectures.

via “dataset splitting and train/validation/test partitioning with stratification”

[Slack](https://camel-kwr1314.slack.com/join/shared_invite/zt-1vy8u9lbo-ZQmhIAyWSEfSwLCl2r2eKA#/shared-invite/email)

Unique: Implements stratified splitting using Arrow's compute kernels for efficient label distribution analysis, and supports temporal splitting with automatic time-based ordering. Uses deterministic hashing for reproducible random splits across different machines.

vs others: More efficient than scikit-learn's train_test_split for large datasets because it operates on Arrow-backed data without materializing in memory, and more flexible because it supports temporal and custom splitting strategies.

via “dataset splitting and train/test/validation partitioning”

HuggingFace community-driven open-source library of datasets

Unique: Implements deterministic splitting with optional stratification, returning a DatasetDict for easy access to splits. The system integrates with the fingerprinting system to ensure reproducible splits across runs.

vs others: More convenient than scikit-learn's train_test_split for dataset objects; supports stratification natively; integrates with dataset pipeline unlike external splitting tools.

via “task-specific train/validation/test split provisioning”

Dataset by nyu-mll. 3,97,160 downloads.

Unique: Implements fixed, peer-reviewed splits across 9 tasks with documented random seeds and class balance constraints, enabling exact reproduction of published results — unlike ad-hoc dataset splits that vary across implementations. Integrates with HuggingFace Datasets' lazy-loading architecture to avoid materializing full splits in memory until needed.

vs others: Eliminates split variance that plagues custom benchmarks by providing official, immutable partitions used in 1000+ published papers, reducing experimental variance from data leakage and enabling fair cross-paper comparisons unlike task-specific datasets with inconsistent split definitions.

via “train-test split stratification and benchmark reproducibility”

Dataset by allenai. 4,25,151 downloads.

Unique: Combines difficulty-stratified splits (Easy/Medium/Hard tiers) with a separate Challenge set from the ARC competition, enabling both broad evaluation and targeted assessment of model reasoning on harder questions, while maintaining fixed seeds for deterministic reproducibility

vs others: More rigorous than ad-hoc 80/20 splits by explicitly controlling for difficulty distribution and providing a separate challenge benchmark, similar to GLUE but with science-domain specificity

via “dataset splitting and train/validation/test set management”

Intuitive app to build your own AI models. Includes no-code synthetic data generation, fine-tuning, dataset collaboration, and more.

via “dataset splitting and train-validation-test partitioning”