MODELS
xAI: Grok 4.3
by xAI
Overview
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.
Details
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.
When to Use
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.
Getting Started
- Review the official Grok 4.3 documentation at https://docs.x.ai/developers/models/grok-4.3.
- Use the model name `grok-4.3` when configuring requests against xAI’s API documentation.
- Check xAI’s models catalog and pricing page for current model availability and per-token API pricing before production use.
- Run a small trial covering your expected text, image, reasoning, function-calling, and structured-output settings.
Key Features
- •Model name: `grok-4.3`
- •Text and image input modalities with text output
- •1,000,000-token context window
- •Configurable reasoning
- •Function calling
- •Structured outputs
- •Listed by xAI as a new model for general non-dedicated use cases
Capabilities
- •reasoning
- •text-input
- •image-input
- •text-output
- •function-calling
- •structured-outputs
- •long-context
Last updated May 31, 2026