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GPT-4o vs Grok 4 Fast
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 36.2% higher average benchmark score. Grok 4 Fast offers 1.9M more tokens in context window than GPT-4o. Grok 4 Fast is $11.80 cheaper per million tokens. Overall, Grok 4 Fast is the stronger choice for coding tasks.
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OpenAI
This updated version of GPT-4o was released with refinements to its multimodal capabilities and improved performance across text, vision, and audio tasks. Built to incorporate learnings from the initial GPT-4o deployment, it enhanced reliability and accuracy while maintaining the seamless cross-modal reasoning that defines the GPT-4o family.
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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.
1 year newer
GPT-4o
OpenAI
2024-08-06
Grok 4 Fast
xAI
2025-08-28
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Pricing Comparison
Cost per million tokens (USD)
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GPT-4o
Input:$2.50
Output:$10.00
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Grok 4 Fast
Input:$0.20
Output:$0.50($11.80 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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GPT-4o
Average Score:54.1%
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Grok 4 Fast
Average Score:90.3%(+36.2%)
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4o
2 providers
Azure
Throughput: 99 tok/s
Latency: 0.53ms
OpenAI
Throughput: 132 tok/s
Latency: 0.5ms
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GPT-4o
Avg Score:54.1%
Providers:2
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Grok 4 Fast
Avg Score:90.3%(+36.2%)
Providers:1