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Grok 4 Fast
xAI
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|---|---|
| Overview | |
| Provider | xAI |
| DFO score | 29.5 |
| Performance Tier | Emerging |
| Best For | – |
| Released | Sep 2025 |
| Knowledge Cutoff | – |
| Pricing | |
| Input / 1M tokens | $0.20 |
| Output / 1M tokens | $0.50 |
| Performance | |
| Context Window | 2M |
| Throughput (tok/s) | – |
| Latency (TTFT ms) | – |
| Parameters | – |
| What the boards rank on | |
| Intelligence Index | 17.9 |
| Coding Index | – |
| Agentic Index | – |
| Arena creative writing | – |
| Arena instruction following | – |
| Capabilities | |
| Tool Use | Yes |
| Function Calling | Yes |
| Vision | Yes |
| Open Source | No |
| License | – |
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