Chinese startup Moonshot AI’s new AI model sent markets tumbling on Friday. This is what you need to know about the model and its babyfaced founder, Yang Zhilin.

Moonshot's Kimi K3 beat Claude Fable 5 and GPT 5.6 in some benchmarks... and it's an open model.

“K3 stands as Moonshot AI's most powerful open-source coding model to date,” Moonshot AI wrote in a press release.

Kimi K3 beats latest offerings by US rivals on some benchmarks

US stocks take hit after China-based start-up's AI model debuts