xAI·Grok family

Grok 4.3

proprietaryReleased Apr 2026

xAI's latest and most intelligent model with strong agentic tool calling, minimal hallucinations, and configurable reasoning. Supports 1M token context window with competitive pricing.

Capabilities

chatcompletionfunction-callingvisioncode-generationreasoning

Modalities

textimagecode

Context Window

1.0M tokens

Providers

available

Available from 1 provider

Cheapest

xAI

$3.75/1M tokens

xAI

Providers (1)

Sorted by total cost (input + output per 1M tokens). Click a row to view provider details.

Provider	Pricing (per 1M)	Rate Limits	Regions	Health	Latency
xAI	In: $1.25Out: $2.50	300 RPM / 500K TPM	us-east-1global	Healthy	0ms

Quick Start

Use this model via xAI with an OpenAI-compatible SDK.

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.xai.com/v1",
  apiKey: process.env.XAI_API_KEY,
});

const response = await client.chat.completions.create({
  model: "grok-4.3",
  messages: [
    { role: "user", content: "Hello!" }
  ],
});

console.log(response.choices[0].message.content);

Using xAI API • OpenAI-compatible SDK