Compare Grok 4.5 from Grok and Nemotron 3 Ultra 550B A55B (free) from Nvidia on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
Grok 4.5
Nemotron 3 Ultra 550B A55B (free)Grok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math. With both intelligent and efficient reasoning, Grok 4.5 excels at real engineering tasks and exceeds comparable leading models at these tasks.
NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model featuring an extensive 1,000,000-token context length. Built on a hybrid Transformer-Mamba mixture-of-experts (MoE) architecture, it operates with 55B active parameters out of a total of 550B parameters. This advanced structure is designed to support sophisticated reasoning and complex task orchestration.
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
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Grok 4.5 accepts 500,000 and Nemotron 3 Ultra 550B A55B (free) accepts 1,000,000 input tokens.
Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context; Nemotron 3 Ultra 550B A55B (free) accepts text input and supports reasoning, tool calling and long context.
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