Grok 4.3
xAI · 2026-04-30
Grok 4.3 is xAI's flagship model released in April 2026, with a 1 million-token context window and configurable reasoning. xAI's current docs describe it as their most advanced flagship model, focused on low hallucination rates, agentic tool calling, and instruction following, with text and image inputs and text output.