Using Grok 4.20 on OpenRouter

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-4.20 — see the documentation for request format.
3. 3
   You'll be billed $1.25/1M input, $2.50/1M output tokens. See full pricing.

Code Examples

About OpenRouter

OpenRouter provides a unified interface for Large Language Models with better pricing, improved uptime, and no subscription requirements. Route across providers for cost optimization and reliability.

Multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.

Pricing on OpenRouter

Capabilities

About Grok 4.20

Newest xAI flagship with industry-leading speed and lowest hallucination rate. Features agentic tool calling, function calling, and structured outputs. Text-only; does not support the reasoning.effort parameter (returns error if specified). API ID: grok-4.20.