xAI: Grok 4 Fast
Grok
Multimodal
Paid
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 on xAI's [news post](http://x.ai/news/grok-4-fast). Reasoning can be enabled using the `reasoning` `enabled` parameter in the API. [Learn more in our docs](https://openrouter.ai/docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)
Parameters
-
Context Window
2,000,000
tokens
Input Price
$0.2
per 1M tokens
Output Price
$0.5
per 1M tokens
Capabilities
Model capabilities and supported modalities
Performance
Reasoning
Excellent reasoning capabilities with strong logical analysis
Math
-
Coding
-
Knowledge
-
Modalities
Input Modalities
text,image
Output Modalities
text
LLM Price Calculator
Calculate the cost of using this model
$0.000300
$0.001500
Input Cost:$0.000300
Output Cost:$0.001500
Total Cost:$0.001800
Estimated usage: 4,500 tokens
Monthly Cost Estimator
Based on different usage levels
Light Usage
$0.0070
~10 requests
Moderate Usage
$0.0700
~100 requests
Heavy Usage
$0.7000
~1000 requests
Enterprise
$7.0000
~10,000 requests
Note: Estimates based on current token count settings per request.
Last Updated: 1970/01/21