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Grok-4 Heavy vs Kimi K2 0905
Comprehensive side-by-side LLM comparison
Kimi K2 0905 leads with 2.5% higher average benchmark score. Grok-4 Heavy supports multimodal inputs. Kimi K2 0905 is available on 2 providers. Both models have their strengths depending on your specific coding needs.
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xAI
Grok-4 Heavy is a multimodal language model developed by xAI. It achieves strong performance with an average score of 79.5% across 6 benchmarks. It excels particularly in AIME 2025 (100.0%), HMMT25 (96.7%), GPQA (88.4%). As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents xAI's latest advancement in AI technology.
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Moonshot AI
Kimi K2 0905 is a language model developed by Moonshot AI. This model demonstrates exceptional performance with an average score of 84.0% across 6 benchmarks. It excels particularly in HumanEval (94.5%), MMLU (90.2%), MATH (89.1%). It supports a 524K token context window for handling large documents. The model is available through 2 API providers. Released in 2025, it represents Moonshot AI's latest advancement in AI technology.
1 month newer
Grok-4 Heavy
xAI
2025-07-09
Kimi K2 0905
Moonshot AI
2025-09-05
Performance Metrics
Context window and performance specifications
Average performance across 11 common benchmarks
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Grok-4 Heavy
Average Score:43.4%
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Kimi K2 0905
Average Score:45.8%(+2.5%)
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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:43.4%
Providers:0
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Kimi K2 0905
Avg Score:45.8%(+2.5%)
Providers:2