xAI: grok-4-0709 API
xAI's first true frontier reasoning model released on July 9, 2025. Trained on the Colossus cluster, it features "Think Mode" and native tool-use, excelling in PhD-level science, multi-step math, and real-time X-integrated research.
- Context window: 256,000 tokens
- Max output: 16,384 tokens
- Input: text, image
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2025-07-09
- Knowledge cutoff: 2024-12-30
Frequently Asked Questions
What is the context window of grok-4-0709?
grok-4-0709 supports a context window of up to 256,000 tokens.
Does grok-4-0709 support function calling?
Yes. grok-4-0709 supports tool / function calling.
Does grok-4-0709 support reasoning?
Yes. grok-4-0709 is a reasoning-capable model.
What is the knowledge cutoff of grok-4-0709?
The knowledge cutoff of grok-4-0709 is 2024-12-30.