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Grok-4 Heavy vs Llama 3.1 Nemotron Ultra 253B v1
Comprehensive side-by-side LLM comparison
Grok-4 Heavy leads with 17.7% higher average benchmark score. Grok-4 Heavy supports multimodal inputs. Overall, Grok-4 Heavy is the stronger choice for coding tasks.
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xAI
Grok 4 Heavy was created as a larger, more capable variant of Grok 4, designed to provide maximum reasoning depth and analytical capability. Built for the most demanding applications requiring sophisticated problem-solving, it represents xAI's flagship offering in the fourth generation.
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NVIDIA
Llama 3.1 Nemotron Ultra 253B was developed as NVIDIA's largest Nemotron variant, designed to provide maximum capability through extensive customization of large-scale foundations. Built with 253 billion parameters and NVIDIA's specialized training, it represents the flagship offering in the Nemotron family.
3 months newer
Llama 3.1 Nemotron Ultra 253B v1
NVIDIA
2025-04-07
Grok-4 Heavy
xAI
2025-07-09
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Average performance across 3 common benchmarks
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Grok-4 Heavy
Average Score:89.3%(+17.7%)
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Llama 3.1 Nemotron Ultra 253B v1
Average Score:71.6%
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Knowledge Cutoff
Training data recency comparison
Llama 3.1 Nemotron Ultra 253B v1
2023-12-01
Grok-4 Heavy
2024-12-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Grok-4 Heavy
0 providers
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Llama 3.1 Nemotron Ultra 253B v1
0 providers
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Grok-4 Heavy
Avg Score:89.3%(+17.7%)
Providers:0
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Llama 3.1 Nemotron Ultra 253B v1
Avg Score:71.6%
Providers:0