Moonshot releases Kimi K3, largest open-weight model to date | AI Wee…

Moonshot AI released Kimi K3, a 2.8-trillion-parameter open-weight model with frontier-class benchmark performance (third on GDPval-AA v2), 1-million-token context window, and native vision, with full weights publishing 27 July. The sparse mixture-of-experts architecture keeps inference costs low whilst matching closed-source competitors from Anthropic and OpenAI. If you're building on Claude or GPT APIs today, you now have a frontier-class fallback you can download and run yourself, without paying per token or asking for API access. That changes your unit economics and your negotiating power with Anthropic and OpenAI.