Arena (LMArena)

Records how working professionals reason through real tasks and packages it as training data for frontier model developers.

Human evaluation, RLHF preference data and post-training datasets with a scalable-oversight focus.

Publicly listed veteran of the data industry offering training data, annotation and model evaluation with a large global crowd.

Provides multilingual datasets, secure data operations and responsible-AI services to model labs and enterprises.

Research and design lab producing expert-authored task sets for training and benchmarks for evaluation.

Managed workforce plus consulting for labeling, annotation and model monitoring.