LLM Reference
OpenRouter

Using Grok Code Fast 1 on OpenRouter

Implementation guide · Grok 4 · xAI

Serverless

OpenRouter exposes Grok Code Fast 1 through model ID x-ai/grok-code-fast-1. 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-code-fast-1 — see the documentation for request format.
  3. 3
    You'll be billed $0.20/1M input, $1.50/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$0.20
Output tokens$1.50

Capabilities

JSON / Tool useStructured Outputs

About Grok Code Fast 1

xAI's Grok Code Fast 1 is a code-specialized Mixture-of-Experts model released August 27, 2025. It was retired on May 15, 2026; xAI lists grok-build-0.1 as its direct replacement for current coding-agent work.

Full model details →

Model Specs

Released2025-08-27
Parameters314B
Context262k
ArchitectureMixture of Experts

More Models on OpenRouter

Grok 4Grok 4.20 Multi-AgentGrok 4.1 FastGrok 4.3Grok 4.20Grok Build 0.1
All models on OpenRouter →

Also available on(2)

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

Provider

OpenRouter
OpenRouter

OpenRouter, Inc.

New York, NY, USA