Grok 4.3
xAI
x-ai/grok-4.3Grok 4.3 is an iteration in xAI's Grok 4.x line, improving on Grok 4.20 with incremental gains in reasoning, coding, and agentic task performance. It is positioned as a high-intelligence general-purpose model for complex problem solving.
Cost rate
0.6x
Context
1M
Released
Apr 30, 2026
Input
TextImageFile
Output
Text
Support
ReasoningTool callingStructured outputs
Best at
The categories where this model ranks highest.