Grok 3 Fast API
About
Process massive datasets with Grok 3 Fast, featuring an expansive 131K context window for long-document analysis. This model delivers cost-effective pricing at $5.00/1M input and $25.00/1M output tokens, native tool calling support. Access Grok 3 Fast via the xAI API with up to 8K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
No
Structured Output
No
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
131K
Tokens
Input Limit
131K
Tokens
Max Output
8K
Tokens
Pricing
Standard (per 1M tokens)
Input
$5.00
Output
$25.00
Caching (per 1M tokens)
Read
$1.25
Frequently Asked Questions
Grok 3 Fast by xAI costs $5.00 per 1M input tokens and $25.00 per 1M output tokens. Cached reads cost $1.25 per 1M tokens.
Model Details
API Integration