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Claude Opus 4 vs Grok-4 Heavy
Comprehensive side-by-side LLM comparison
Grok-4 Heavy leads with 16.6% higher average benchmark score. Claude Opus 4 is available on 4 providers. Overall, Grok-4 Heavy is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4 was developed as the flagship model in the Claude 4 generation, designed to push the boundaries of AI capability in complex reasoning, analysis, and multi-step problem-solving. Built to handle the most demanding enterprise tasks, it represents Anthropic's highest tier of intelligence and capability.
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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.
1 month newer
Claude Opus 4
Anthropic
2025-05-22
Grok-4 Heavy
xAI
2025-07-09
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Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Claude Opus 4
Average Score:77.6%
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Grok-4 Heavy
Average Score:94.2%(+16.6%)
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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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Claude Opus 4
4 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 120 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
ZeroEval
Throughput: 42 tok/s
Latency: 0.4ms
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Claude Opus 4
Avg Score:77.6%
Providers:4
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Grok-4 Heavy
Avg Score:94.2%(+16.6%)
Providers:0