Zen LM
Frontier AI models for code, reasoning, and multimodal understanding
zen4-ultra
1.04T MoE · 384 experts · 256K ctx
zen4-pro-max
80B MoE · Flagship consumer
zen4-coder-flash
31B MoE · 59.2% SWE-bench
Zen5 Ultra — 2T+ MoDE — Coming Soon
The largest open-weight model in history. Request research access