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DeepSeek-V3.1 vs Grok 4 Fast
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 25.5% higher average benchmark score. Grok 4 Fast offers 1.7M more tokens in context window than DeepSeek-V3.1. Grok 4 Fast is $0.57 cheaper per million tokens. Grok 4 Fast supports multimodal inputs. Overall, Grok 4 Fast is the stronger choice for coding tasks.
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DeepSeek
DeepSeek-V3.1 was developed as an incremental advancement over DeepSeek-V3, designed to refine the mixture-of-experts architecture with improved training techniques. Built to enhance quality and efficiency while maintaining the open-source philosophy, it represents continued iteration on DeepSeek's flagship model line.
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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.
7 months newer
DeepSeek-V3.1
DeepSeek
2025-01-10
Grok 4 Fast
xAI
2025-08-28
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Pricing Comparison
Cost per million tokens (USD)
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DeepSeek-V3.1
Input:$0.27
Output:$1.00
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Grok 4 Fast
Input:$0.20
Output:$0.50($0.57 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 6 common benchmarks
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DeepSeek-V3.1
Average Score:56.3%
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Grok 4 Fast
Average Score:81.8%(+25.5%)
Provider Availability & Performance
Available providers and their performance metrics
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DeepSeek-V3.1
2 providers
DeepInfra
Novita
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Grok 4 Fast
1 providers
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DeepSeek-V3.1
Avg Score:56.3%
Providers:2
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Grok 4 Fast
Avg Score:81.8%(+25.5%)
Providers:1