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.

Sources

• Best open-weight models for coding - Faros AI
• 7 best open weight AI models I've tested in 2026 - Gumloop
• Best Open-Weights AI Models for Business (2026) - Layer3Labs
• The Open Weight Models that Matter: June 2026 — OpenRouter Blog
• China's Moonshot AI releases Kimi K3, the largest open-source model ever, rivaling top U.S. systems | VentureBeat

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