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Grok Code Fast 1 vs Grok-4 Heavy
Comprehensive side-by-side LLM comparison
Grok-4 Heavy supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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xAI
Grok Code Fast was developed as a specialized coding model optimized for speed, designed to provide rapid code completion, generation, and assistance. Built to serve developers requiring quick feedback and iterative coding support, it combines programming expertise with low-latency responses.
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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
Grok-4 Heavy
xAI
2025-07-09
Grok Code Fast 1
xAI
2025-08-28
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Performance Metrics
Context window and performance specifications
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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 Code Fast 1
1 providers
xAI
Throughput: 76.41 tok/s
Latency: 1.38ms
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Grok-4 Heavy
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Grok Code Fast 1
Avg Score:0.0%
Providers:1
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Grok-4 Heavy
Avg Score:0.0%
Providers:0