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Grok 4 Fast vs o1
Comprehensive side-by-side LLM comparison
Grok 4 Fast leads with 27.8% higher average benchmark score. Grok 4 Fast offers 1.7M more tokens in context window than o1. Grok 4 Fast is $74.30 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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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.
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OpenAI
o1 was developed as part of OpenAI's reasoning-focused model series, designed to spend more time thinking before responding. Built to excel at complex reasoning tasks in science, coding, and mathematics, it employs extended internal reasoning processes to solve harder problems than traditional language models through careful step-by-step analysis.
8 months newer
o1
OpenAI
2024-12-17
Grok 4 Fast
xAI
2025-08-28
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Pricing Comparison
Cost per million tokens (USD)
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Grok 4 Fast
Input:$0.20
Output:$0.50($74.30 cheaper)
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o1
Input:$15.00
Output:$60.00
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Grok 4 Fast
Average Score:90.3%(+27.8%)
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o1
Average Score:62.5%
Provider Availability & Performance
Available providers and their performance metrics
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Grok 4 Fast
1 providers
xAI
Throughput: 90 tok/s
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o1
2 providers
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Grok 4 Fast
Avg Score:90.3%(+27.8%)
Providers:1
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o1
Avg Score:62.5%
Providers:2