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20 JUL 2026 · Nathan Lambert

Moonshot AI's release of Kimi K3, a 2.8T parameter model, has narrowed the performance gap between open and closed models from 6-9 months to 3-5 months, with Kimi K3 being the strongest open model ever released, rivaling the performance of closed models from Anthropic, OpenAI, and DeepMind. The model's success suggests that Chinese companies are capable of building high-quality models without relying on IP theft, and Moonshot AI's approach is more extreme than previously thought. The open weights release of Kimi K3 will likely have significant implications for the AI ecosystem, including increased competition and a need for coordination as powerful technologies are rolled out globally. AI summary