Epoch Capabilities Index (ECI)
https://epoch.ai/data/ai-benchmarking-dashboard
- Kind
- benchmark
- Maintainer
- TODO
- Measures
- TODO — adopted on autopilot; to be filled after a first review.
- Does not measure
- TODO
- Known issues
- Adopted on autopilot from a pipeline proposal; kind, axes, and description not yet reviewed.
- Trust
- low
- Last reviewed
- 2026-10-07
Confirmed live in this run's fetch with a current value — Epoch's composite reads 167, topped by Claude Opus 5.5, across 87 benchmarks and 407 models. This matters now because Artificial Analysis version 4.3.2 has folded Terminal-Bench 4.0 into its own index, meaning the reasoning and agentic axes are no longer independent readings. Epoch is already a trusted source here and gives reasoning a second, separately-built instrument.