Using Grok 4 on OpenRouter

Implementation guide · Grok 4 · xAI

Serverless

OpenRouter exposes Grok 4 through model ID x-ai/grok-4. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-07-09. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at OpenRouter and generate an API key.
  2. 2
    Use the OpenRouter SDK or REST API to call x-ai/grok-4 — see the documentation for request format.
  3. 3
    You'll be billed $3.00/1M input, $15.00/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$3.00
Output tokens$15.00

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsCode ExecutionPrompt Caching

About Grok 4

Original Grok 4 API model (grok-4-0709) with 256K context, reasoning, text and image input, function calling, structured outputs, live browsing, and code execution support. xAI lists May 15, 2026 as the API retirement date for this model; new integrations should use Grok 4.3.

Full model details →

Model Specs

Released2025-07-09
Context256k
ArchitectureDecoder Only

More Models on OpenRouter

Grok 4.20 Multi-AgentGrok 4.1 FastGrok Code Fast 1Grok 4.3Grok 4.20Grok Build 0.1
All models on OpenRouter →

Also available on(3)

xAI Console$1.25/1MReplicate API$7.20/1MMicrosoft Foundry
Compare all providers →

Provider

OpenRouter

OpenRouter, Inc.

New York, NY, USA