MODELS
by xAI
Grok 4.3 is an xAI reasoning model with text and image inputs, text output, a 1,000,000-token context window, configurable reasoning, function calling, and structured outputs.
Grok 4.3 is listed in xAI’s official model documentation as model name `grok-4.3`. The supplied xAI docs describe it as supporting text and image input modalities with text output, a 1,000,000-token context window, configurable reasoning, function calling, and structured outputs. xAI’s models catalog marks Grok 4.3 as a new model and recommends it for general non-dedicated use cases. xAI’s API page describes `grok-4.3` as its newest flagship model and links developers to official documentation and console access.
Use Grok 4.3 when you need an xAI reasoning model for general non-dedicated use cases, as recommended by xAI’s models catalog. Use it for applications that need text and image inputs with text output, a large 1,000,000-token context window, function calling, or structured outputs. Evaluate it for agentic workflows and instruction-following tasks where OpenRouter’s listing indicates it is suited.
Last updated May 31, 2026
