How UK AISI and EvalEval Are Making Benchmark Results Reproducible

AISI and EvalEval have previously collaborated on research that began at a joint workshop alongside NeurIPS 2025, and feedback from the Institute has helped shape the Every Eval Ever (EEE) schema. This next phase of the collaboration puts that shared infrastructure into practice. As AI deployment accelerates, evaluations are becoming increasingly important sources of evidence about model and system performance.

Yet results are reported across many formats, platforms, and outlets, often without enough information to reproduce them. Running the evaluations again may itself be prohibitively expensive. EvalEval's mission is to improve this ecosystem through a shared reporting schema, Every Eval Ever, and an open platform, Evaluation Cards, that brings evaluation results and the information needed to interpret them into a common structure.

This builds naturally on AISI's work to make evaluation more efficient through OptStop, more statistically rigorous through HiBayES, and more standardised in areas including transcript analysis and capability elicitation. Together, AISI and EvalEval are working to diagnose gaps in evaluation reporting and build shared infrastructure to close them. Transcript-level transparency matters not only for reproducibility, but also for…