xAI: Grok 4.3 API
Grok 4.3 by xAI. 2,000,000 token context. Call it via ePhone AI's unified API.
- Context window: 2,000,000 tokens
- Max output: 2,000,000 tokens
- Input: text, image
- Output: text
- Reasoning: Supported
- Tool calling: Supported
- File input: Supported
- Released: 2026-05-01
- Knowledge cutoff: 2026-02-28
Frequently Asked Questions
What is the context window of Grok 4.3?
Grok 4.3 supports a context window of up to 2,000,000 tokens.
Does Grok 4.3 support function calling?
Yes. Grok 4.3 supports tool / function calling.
Does Grok 4.3 support reasoning?
Yes. Grok 4.3 is a reasoning-capable model.
What is the knowledge cutoff of Grok 4.3?
The knowledge cutoff of Grok 4.3 is 2026-02-28.