World's Largest Open-Weight AI Models: Top 3

Moonshot AI's Kimi K3, with 2.8 trillion parameters, is currently the world's largest open-weight AI model, closely followed by other major contenders in the rapidly evolving AI landscape.

The top 3

1. Kimi K3's Scale: Parameters & Context: Kimi K3 boasts 2.8 trillion parameters and a 1-million-token context window, featuring native visual understanding and an 'always-on reasoning' mode.
2. Leading Open-Weight Models by Parameters: Beyond Kimi K3, other significant open-weight models include DeepSeek V4 Pro at 1.6 trillion parameters, and various models from Meta's Llama series, Mistral AI, and Alibaba's Qwen family.
3. Longest Context Window Champions: While Kimi K3 offers a 1M-token context window, other models like GPT-5.4 (1.1M tokens), Claude Fable 5 (1M+ tokens), and Gemini 3.1 Pro (1M tokens) also lead in processing extensive information.

Sources

• Chinese AI Startup Moonshot Unveils Kimi K3 Model—Will It Challenge OpenAI And Anthropic? - Forbes
• China's 2.8-trillion-parameter Kimi K3 beats Claude Fable 5 in Frontend Code Arena benchmark— Moonshot AI delivers largest open-weight AI model ever, as China works around U.S. compute limits | Tom's Hardware
• Kimi K3 - Kimi API Platform
• Moonshot AI just released Kimi K3. It is a 2.8-trillion-parameter model with native vision and a 1-million-token context window. Moonshot calls it the world's first open 3T-class model. : r/machinelearningnews - Reddit
• China's Moonshot AI releases Kimi K3, the largest open-source model ever, rivaling top U.S. systems | VentureBeat

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