Grok 4 Fast: Benchmarks, Pricing & Context Window
Grok 4 Fast is a language model from xAI, released in August 2025, with multimodal input.
Grok 4 Fast is a high-speed variant of Grok-4, optimized for faster inference while maintaining strong reasoning capabilities. It offers improved throughput and lower latency compared to the standard Grok-4 model.
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Grok 4 Fast pricing
Providers
Grok 4 Fast starts at $0.200 per million input tokens and $0.500 per million output tokens via xAI.
| Provider | Input $/M | Output $/M | Max Input | Max Output | Latency s | Throughput | Quant | Input | Output |
|---|---|---|---|---|---|---|---|---|---|
 xAI | $0.200 | $0.500 | 2.0M | 30.0K | 5.21 | 211 c/s | — |
Grok 4 Fast API
API access coming soon
Grok 4 Fast will be available through our gateway shortly.
Grok 4 Fast examples
Recent arena outputs from Grok 4 Fast, picked from the highest-ranked matchups.
Grok 4 Fast license
Grok 4 Fast is released under the Proprietary license, which restricts commercial use.
- License
- Proprietary
- Non-commercial
Proprietary license - usage restrictions apply
FAQ
Common questions about Grok 4 Fast.