Grok 4 Fast
xAI
The Grok 4 Fast AI model by xAI offers developers a powerful tool for advanced reasoning and multimodal tasks. With a massive context window of 2,000,000 tokens and the ability to handle text input, vision, and function calling, this model is perfect for complex AI applications. Priced at $0.2/M input and $0.5/M output tokens, the Grok 4 is a cost-effective solution for cutting-edge AI development.
Key Specifications
Context Window
2.0M tokens
Max Output Tokens
30K tokens
Input Pricing
$0.20
per million tokens
Output Pricing
$0.50
per million tokens
Capabilities
- Text Generation
- Vision
- Function Calling
- Advanced Reasoning
- File Attachments
Additional Details
- Provider
- xAI
- Release Date
- September 19, 2025
- Advanced Reasoning
- Supported
- Supported Input Types
- text, image