Kimi K2.5 has achieved a new milestone among open-source language models, scoring 147 on the Epoch Capabilities Index (ECI).

Epoch Capabilities Index (ECI)

The ECI is a composite index that evaluates model capabilities by combining the results of various benchmarks. This provides a more comprehensive view of a model's performance compared to analyzing a single test.

Comparison with other models

The Kimi K2.5 score places it at the same level as proprietary models like o3, Grok 4, and Sonnet 4.5. However, it is important to note that Kimi K2.5 still lags behind the most advanced models currently available.