Grok 4 Fast
Multimodal
Zero-eval
#1HLE
#2SimpleQA
#2HMMT 2025
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by xAI
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About
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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Pricing Range
Input (per 1M)$0.20 -$0.20
Output (per 1M)$0.50 -$0.50
Providers1
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Timeline
AnnouncedAug 28, 2025
ReleasedAug 28, 2025
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Specifications
Capabilities
Multimodal
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License & Family
License
Proprietary
Performance Overview
Performance metrics and category breakdown
Overall Performance
7 benchmarks
Average Score
73.0%
Best Score
95.0%
High Performers (80%+)
5Performance Metrics
Max Context Window
2.0MAvg Throughput
90.0 tok/s+
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All Benchmark Results for Grok 4 Fast
Complete list of benchmark scores with detailed information
| SimpleQA | text | 0.95 | 95.0% | Self-reported | |
| HMMT 2025 | text | 0.93 | 93.3% | Self-reported | |
| AIME 2025 | text | 0.92 | 92.0% | Self-reported | |
| GPQA | text | 0.86 | 85.7% | Self-reported | |
| LiveCodeBench | text | 0.80 | 80.0% | Self-reported | |
| BrowseComp | text | 0.45 | 44.9% | Self-reported | |
| HLE | multimodal | 0.20 | 20.0% | Self-reported |
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