Moonshot AI Kimi K3: World's Largest Open-Weight AI Model

Moonshot AI is preparing to release its Kimi K3 model for public download. This Chinese AI start-up will make the world’s largest open-weight AI model available, allowing users to fine-tune and run it locally for free. Here's the thing: The Kimi K3 boasts 2.8 trillion parameters. Its performance closely rivals the newest models from OpenAI and Anthropic. What's interesting is that it performed "competitively" with Fable 5 and "substantially outperformed" Opus-4.8, GPT-5.6 Sol, and GPT-5.5. The company temporarily paused new subscriptions after K3's launch due to overwhelming interest. Moonshot also hit a $20 billion valuation in May after a $2 billion raise. They are reportedly working towards a public listing in as early as six months. The bottom line: This release could significantly impact the open-source AI landscape and cloud businesses.