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Grok-4 Heavy vs Kimi K2 0905
Comprehensive side-by-side LLM comparison
Grok-4 Heavy leads with 12.6% higher average benchmark score. Grok-4 Heavy supports multimodal inputs. Kimi K2 0905 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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Moonshot AI
Kimi K2 was introduced as the second generation of Moonshot's language model family, designed to provide enhanced capabilities across language understanding and generation. Built with architectural improvements and expanded training, it represents a significant advancement in Moonshot's model offerings.
1 month newer
Grok-4 Heavy
xAI
2025-07-09
Kimi K2 0905
Moonshot AI
2025-09-05
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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%(+12.6%)
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Kimi K2 0905
Average Score:75.8%
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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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Kimi K2 0905
2 providers
Novita
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Grok-4 Heavy
Avg Score:88.4%(+12.6%)
Providers:0
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Kimi K2 0905
Avg Score:75.8%
Providers:2