What is Kimi K3? China’s new AI model aces Claude Fable 5 and GPT-5.6

Weeks after OpenAI’s grand release of GPT-5.6 globally, China’s homegrown AI firm, Moonshot AI, has released a ‘Fable-class’ AI model. Beijing’s AI startup brings Kimi K3 – a massive 2.8-trillion-parameter open-weight Mixture-of-Experts (MoE) model that’s acing the benchmarks, competing with frontier-tier AI models like Anthropic’s Claude Fable 5 and OpenAI’s GPT-5.6.

For context, Kimi K3 is now leading in the Frontend Code Arena with 1679 points, surpassing Anthropic’s Claude Fable 5, GPT-5.6 Sol and Grok 4.5.