How UK AISI and EvalEval Are Making Benchmark Results Reproducible

The EvalEval Coalition is thrilled to share that the UK AI Security Institute (AISI) is using EvalEval's infrastructure to openly share evaluation results, supporting more reproducible and verifiable evaluation science.

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.

Why reproducible evaluation reporting matters

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.

What AISI is sharing

Transcript-level transparency matters not only for reproducibility, but also for analysis and diagnosis. In this new phase of the collaboration, AISI is making publicly reported evaluation methods and findings available through Evaluation Cards where appropriate. The release includes verified results, context, and configuration information for the five benchmarks in the paper's main experiment:

• HealthBench
• FrontierMath
• Humanity's Last Exam
• SWE-Bench Pro
• Terminal-Bench 2.0