Kimi K3 open-weight model beats Opus 4.8 on some benchmarks

Moonshot AI's Kimi K3, a 2.8-trillion-parameter fully open-source model, beats Anthropic's Opus 4.8 on frontier benchmarks according to Artificial Analysis, marking the first time a Chinese open-weight model achieves this. It remains behind Claude Fable 5 and GPT-5.6 overall and is currently in beta with limited access.