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Grok 4 Fast vs Kimi K2 Base
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 48.6% higher average benchmark score. Grok 4 Fast supports multimodal inputs. Overall, Grok 4 Fast is the stronger choice for coding tasks.
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xAI
Grok 4 Fast is a multimodal language model developed by xAI. It achieves strong performance with an average score of 73.0% across 7 benchmarks. It excels particularly in SimpleQA (95.0%), HMMT 2025 (93.3%), AIME 2025 (92.0%). With a 2.0M token context window, it can handle extensive documents and complex multi-turn conversations. The model is available through 1 API provider. 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 Base was created as the foundation model in the K2 series, designed to serve as a starting point for fine-tuning and customization. Built to provide strong base capabilities for domain-specific applications, it enables developers to build specialized solutions on Moonshot's architecture.
1 month newer
Kimi K2 Base
Moonshot AI
2025-07-11
Grok 4 Fast
xAI
2025-08-28
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Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Grok 4 Fast
Average Score:90.3%(+48.6%)
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Kimi K2 Base
Average Score:41.7%
Provider Availability & Performance
Available providers and their performance metrics
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Grok 4 Fast
1 providers
xAI
Throughput: 90 tok/s
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Kimi K2 Base
0 providers
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Grok 4 Fast
Avg Score:90.3%(+48.6%)
Providers:1
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Kimi K2 Base
Avg Score:41.7%
Providers:0