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Grok 4 Fast vs Grok-3 Mini
Comprehensive side-by-side LLM comparison
Both models show comparable benchmark performance. Grok 4 Fast offers 1.9M more tokens in context window than Grok-3 Mini. Both models have similar pricing. Both models have their strengths depending on your specific coding needs.
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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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xAI
Grok 3 Mini was developed as an efficient version of Grok 3, designed to bring next-generation capabilities to resource-conscious deployments. Built to provide strong performance with practical efficiency, it extends Grok 3's innovations to broader application scenarios.
6 months newer
Grok-3 Mini
xAI
2025-02-17
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($0.10 cheaper)
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Grok-3 Mini
Input:$0.30
Output:$0.50
Performance Metrics
Context window and performance specifications
Average performance across 3 common benchmarks
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Grok 4 Fast
Average Score:85.9%(+0.8%)
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Grok-3 Mini
Average Score:85.1%
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Knowledge Cutoff
Training data recency comparison
Grok-3 Mini
2024-11-17
More recent knowledge cutoff means awareness of newer technologies and frameworks
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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Grok-3 Mini
1 providers
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Grok 4 Fast
Avg Score:85.9%(+0.8%)
Providers:1
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Grok-3 Mini
Avg Score:85.1%
Providers:1