Kimi K3 Released, Gap Between Open-Source and Closed-Source Models Narrows to 4 Points

TechFlow News, July 28, Moonshot AI launched the open-source model Kimi K3, scoring 57 points on the Artificial Analysis Intelligence Index, becoming the third highest-scoring model, trailing only Anthropic's Claude Opus 5 (61 points), Claude Fable 5 (60 points), and OpenAI's GPT-5.6 Sol (59 points). The index shows that the gap between leading closed-source models and open-weight models has narrowed to 4 points, the smallest gap since the release of GLM-5 in February. This marks that open-source models are rapidly catching up to closed-source models in performance.