# Kimi K2.7 ranks second behind Fable 5 and above GPT 5.5 xhigh in ErdosBench's mathematical research test

> Source: <https://runtimewire.com/article/kimi-k2-7-ranks-second-behind-fable-5-and-gpt-5-5-xhigh-in-erdosbench-s-mathemat>
> Published: 2026-06-14 05:22:07+00:00

Przemek Chojecki (@prz chojecki) put Kimi K2.7 Code in the top tier of his ErdosBench public smoke test on June 13, ranking Moonshot AI's new coding model second behind Claude Fable 5 max and ahead of GPT 5.5 xhigh. Chojecki, the ulam.ai founder and mathematician who has been turning synthetic Erdos style research problems into a model evaluation track, said the rerun covered 14 public problems and compared Kimi K2.7 Code with Qwen 3.7 Max, Grok 4.3 and the leading models from earlier runs. H...