xAI: grok-4-fast-non-reasoning API
A high-speed, cost-optimized variant of Grok-4 that skips the internal thinking phase for near-instant responses. It maintains a massive 2M context window and excels in conversational AI, high-volume data extraction, and real-time tool-calling without the latency of chain-of-thought processing.
- Context window: 2,097,152 tokens
- Max output: 30,000 tokens
- Input: text, image
- Output: text
- Tool calling: Supported
- File input: Supported
- Released: 2025-08-27
- Knowledge cutoff: 2024-10-31
Frequently Asked Questions
What is the context window of grok-4-fast-non-reasoning?
grok-4-fast-non-reasoning supports a context window of up to 2,097,152 tokens.
Does grok-4-fast-non-reasoning support function calling?
Yes. grok-4-fast-non-reasoning supports tool / function calling.
What is the knowledge cutoff of grok-4-fast-non-reasoning?
The knowledge cutoff of grok-4-fast-non-reasoning is 2024-10-31.