A Chinese lab drops a 2.8T open-weight model that rivals Fable 5 and GPT-5.6 Sol on agentic benchmarks
Moonshot AI released Kimi K3 on July 16 — a 2.8 trillion-parameter open-source model with a 1M-token context window and native multimodality. On GDPval-AA v2 it scores 1,687 (third overall, behind only Fable 5 Max and GPT-5.6 Sol Max), and on AA-Briefcase it takes second place at 1,527, beating Opus 4.8 and GPT-5.5. Full open weights drop July 27 under an open license. The architecture introduces Kimi Delta Attention and Attention Residuals, both previously published as open research.


