Frontier open-weights model rivaling Claude Opus 4.8 and GPT-5.5. #1 open model on the Artificial Analysis Intelligence Index, 1M-token context, built for long-horizon agentic coding.
chatcodetoolsreasoningmultilingualenglishgerman
FlagshipProduction
1105K max tokens
1105K input
28 tok/s
nvidia/NVIDIA-Nemotron-3-Ultra-550B-A55B-BF16
NVIDIA's flagship reasoning model. 550B sparse MoE (55B active), strong agentic and tool-use capabilities, optimized for enterprise inference.
chatcodetoolsreasoningmultilingualenglishgerman
Production
128K max tokens
128K input
38 tok/s
deepseek-ai/DeepSeek-V4-Flash
Experimental flash variant of DeepSeek-V4. For testing and evaluation purposes.
chatcodetoolsreasoningmultilingualenglishgerman
Experimental
391K max tokens
391K input
18 tok/s
google/gemma-4-31B-it
Lightweight multimodal agent. Well-suited for reasoning, agentic workflows, coding, and multimodal understanding.