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.
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.
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
Cost per million tokens (USD)

DeepSeek-V3.1

Grok 4 Fast
Context window and performance specifications
Average performance across 6 common benchmarks

DeepSeek-V3.1

Grok 4 Fast
Available providers and their performance metrics

DeepSeek-V3.1
DeepInfra
Novita

Grok 4 Fast

DeepSeek-V3.1

Grok 4 Fast

DeepSeek-V3.1

Grok 4 Fast
xAI