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Grok-4 Heavy vs o1-preview
Comprehensive side-by-side LLM comparison
Grok-4 Heavy leads with 15.1% higher average benchmark score. Grok-4 Heavy supports multimodal inputs. o1-preview is available on 2 providers. 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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OpenAI
o1-preview was introduced as an early version of OpenAI's reasoning model series, designed to demonstrate the potential of AI models that engage in extended thinking before responding. Built to solve complex problems through deliberate reasoning processes, it represented an initial step toward more thoughtful and analytical AI systems.
10 months newer
o1-preview
OpenAI
2024-09-12
Grok-4 Heavy
xAI
2025-07-09
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Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Grok-4 Heavy
Average Score:88.4%(+15.1%)
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o1-preview
Average Score:73.3%
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Knowledge Cutoff
Training data recency comparison
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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o1-preview
2 providers
Azure
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Grok-4 Heavy
Avg Score:88.4%(+15.1%)
Providers:0
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o1-preview
Avg Score:73.3%
Providers:2