x-ai
xAI: Grok 4 Fast
Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning. Read more about the model...
Quality Score
100/100
composite of price, context, capability
Input Price
$0.20
per 1M tokens
Output Price
$0.50
per 1M tokens
Context Window
2,000,000
tokens
- Model ID
- x-ai/grok-4-fast
- Vendor
- x-ai
- Tokenizer
- Grok
- Input Modalities
- text, image, file
- Output Modalities
- text
- Max Output
- 30,000 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- no
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