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Grok-3 vs Grok-4 Heavy
Comprehensive side-by-side LLM comparison
Grok-4 Heavy leads with 3.5% higher average benchmark score. Both models have their strengths depending on your specific coding needs.
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xAI
Grok 3 was introduced as xAI's third-generation flagship model, designed to push the boundaries of reasoning, factual accuracy, and helpful assistance. Built to advance the state of AI capabilities, it incorporates improvements across language understanding, generation, and analytical thinking.
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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.
4 months newer
Grok-3
xAI
2025-02-17
Grok-4 Heavy
xAI
2025-07-09
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Performance Metrics
Context window and performance specifications
Average performance across 3 common benchmarks
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Grok-3
Average Score:85.8%
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Grok-4 Heavy
Average Score:89.3%(+3.5%)
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Knowledge Cutoff
Training data recency comparison
Grok-3
2024-11-17
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-3
1 providers
xAI
Throughput: 100 tok/s
Latency: 0.7ms
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Grok-4 Heavy
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Grok-3
Avg Score:85.8%
Providers:1
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Grok-4 Heavy
Avg Score:89.3%(+3.5%)
Providers:0