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GPT-4 vs Grok 4 Fast
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 50.0% higher average benchmark score. Grok 4 Fast offers 2.0M more tokens in context window than GPT-4. Grok 4 Fast is $89.30 cheaper per million tokens. Overall, Grok 4 Fast is the stronger choice for coding tasks.
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OpenAI
GPT-4 was created as a large multimodal model capable of accepting image and text inputs while producing text outputs. Developed to exhibit human-level performance on various professional and academic benchmarks, it marked a significant advancement in reliability, creativity, and handling of nuanced instructions compared to its predecessors.
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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.
2 years newer
GPT-4
OpenAI
2023-06-13
Grok 4 Fast
xAI
2025-08-28
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Pricing Comparison
Cost per million tokens (USD)
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GPT-4
Input:$30.00
Output:$60.00
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Grok 4 Fast
Input:$0.20
Output:$0.50($89.30 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-4
Average Score:35.7%
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Grok 4 Fast
Average Score:85.7%(+50.0%)
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Knowledge Cutoff
Training data recency comparison
GPT-4
2022-12-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4
2 providers
Azure
Throughput: 104 tok/s
Latency: 0.3ms
OpenAI
Throughput: 100 tok/s
Latency: 0.5ms
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GPT-4
Avg Score:35.7%
Providers:2
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Grok 4 Fast
Avg Score:85.7%(+50.0%)
Providers:1