Evaluation
LM Eval Harness
Quick Answer
A flexible framework for evaluating language models on diverse benchmarks using consistent methodology.
LM Eval Harness is a unified framework for running many benchmarks (MMLU, ARC, etc.). It enables consistent evaluation across models. Harness supports 60+ benchmarks. It's the standard tool for benchmark-based evaluation. Reproducibility is better with Harness. Harness simplifies comparison. It's widely used in research and industry.
Last verified: 2026-04-08