Get started with xAI

Build with Grok, the AI model designed to deliver truthful, insightful answers.

Create API key View models

Models

We offer a range of models supporting multiple use cases and modalities.

Grok 4.20

The most truth-seeking large language model in the world.

Context- tokens

Input- / 1M tokens

Output- / 1M tokens

View model

Voice API

Capable of real-time conversation, generation and transcription.

ModesAgent, TTS & STT

Realtime$3.00 / hour

TTS$4.20 / 1M characters

Read docs Try in playground

Imagine API

Turn ideas into reality with our image and video generation models.

ModesGeneration & editing

Image- / image

Video- / second

Read docs Try in playground

Jump straight in

We've prepared some simple examples for you to try.

import os
from xai_sdk import Client
from xai_sdk.chat import user, system

client = Client(
    api_key=os.getenv("XAI_API_KEY"),
)

chat = client.chat.create(model="grok-4.20-reasoning")
chat.append(system("You are Grok, a chatbot inspired by the Hitchhiker's Guide to the Galaxy."))
chat.append(user("What is the meaning of life, the universe, and everything?"))
response = chat.sample()

print(response)

from openai import OpenAI

client = OpenAI(
    api_key="<YOUR_XAI_API_KEY_HERE>",
    base_url="https://api.x.ai/v1",
)

response = client.responses.create(
    model="grok-4.20-reasoning",
    input=[
        {"role": "system", "content": "You are Grok, a chatbot inspired by the Hitchhiker's Guide to the Galaxy."},
        {"role": "user", "content": "What is the meaning of life, the universe, and everything?"},
    ],
)

print(response.output_text)

import OpenAI from "openai";

const client = new OpenAI({
    apiKey: "<api key>",
    baseURL: "https://api.x.ai/v1",
});

const response = await client.responses.create({
    model: "grok-4.20-reasoning",
    input: [
        {
            role: "system",
            content: "You are Grok, a chatbot inspired by the Hitchhiker's Guide to the Galaxy."
        },
        {
            role: "user",
            content: "What is the meaning of life, the universe, and everything?"
        },
    ],
});

console.log(response.output_text);

import { xai } from "@ai-sdk/xai";
import { generateText } from "ai";

const { text } = await generateText({
  model: xai.responses("grok-4.20-reasoning"),
  system: "You are Grok, a chatbot inspired by the Hitchhiker's Guide to the Galaxy.",
  prompt: "What is the meaning of life, the universe, and everything?",
});

console.log(text);

curl https://api.x.ai/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $XAI_API_KEY" \
  -d '{
    "model": "grok-4.20-reasoning",
    "input": [
        {
            "role": "system",
            "content": "You are Grok, a chatbot inspired by the Hitchhiker'\''s Guide to the Galaxy."
        },
        {
            "role": "user",
            "content": "What is the meaning of life, the universe, and everything?"
        }
    ]
}'

Responses API

Generate text, have conversations, use tools, and build AI-powered applications.

Generate text

Multi-turn chat

Function calling

- / 1M input tokens

- / 1M output tokens