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GPT-4.1 vs Grok 4 Fast
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 43.1% higher average benchmark score. Grok 4 Fast offers 949.7K more tokens in context window than GPT-4.1. Grok 4 Fast is $9.30 cheaper per million tokens. Overall, Grok 4 Fast is the stronger choice for coding tasks.
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OpenAI
GPT-4.1 represents an iterative improvement in the GPT-4 series, developed to refine the foundational capabilities established by GPT-4. Built to incorporate learnings and optimizations from the deployment of previous versions, it continues the evolution of OpenAI's flagship model line with enhanced reliability and performance.
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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.
4 months newer
GPT-4.1
OpenAI
2025-04-14
Grok 4 Fast
xAI
2025-08-28
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Pricing Comparison
Cost per million tokens (USD)
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GPT-4.1
Input:$2.00
Output:$8.00
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Grok 4 Fast
Input:$0.20
Output:$0.50($9.30 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 3 common benchmarks
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GPT-4.1
Average Score:47.2%
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Grok 4 Fast
Average Score:90.3%(+43.1%)
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Knowledge Cutoff
Training data recency comparison
GPT-4.1
2024-06-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4.1
1 providers
OpenAI
Throughput: 100 tok/s
Latency: 10ms
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Grok 4 Fast
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GPT-4.1
Avg Score:47.2%
Providers:1
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Grok 4 Fast
Avg Score:90.3%(+43.1%)
Providers:1