XA
xAI
Reasoning
Grok-4 Fast (Reasoning)
Grok-4 Fast (Reasoning) balances speed and reasoning depth, offering chain-of-thought analysis with real-time data at moderate latency.
Key Features
Balanced speed and reasoning
Real-time data access
Chain-of-thought capability
Good analytical depth
Ideal Use Cases
1.
Analytical queries with current context
2.
Market analysis with reasoning
3.
Technical problem solving
4.
Research with real-time data
Technical Specifications
| Context Window | 130K tokens |
| Modality | Text → Text |
| Provider | xAI |
| Category | Reasoning |
| Real-time Data | Yes |
| Thinking Mode | Chain-of-thought |
API Usage
1 curl -X POST https://api.vincony.com/v1/chat/completions \ 2 -H "Authorization: Bearer YOUR_API_KEY" \ 3 -H "Content-Type: application/json" \ 4 -d '{ 5 "model": "x-ai/grok-4-fast-r", 6 "messages": [ 7 { "role": "user", "content": "Hello, Grok-4 Fast (Reasoning)!" } 8 ] 9 }'
Replace YOUR_API_KEY with your Vincony API key. OpenAI-compatible endpoint — works with any OpenAI SDK.
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Frequently Asked Questions
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