LLM Reference
OpenRouter

Using Claude Sonnet 4 on OpenRouter

Implementation guide · Claude 4 · Anthropic

Serverless

OpenRouter exposes Claude Sonnet 4 through model ID anthropic/claude-sonnet-4. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-07-26. 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 anthropic/claude-sonnet-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

VisionMultimodalStructured Outputs

About Claude Sonnet 4

Claude Sonnet 4 API snapshot (claude-sonnet-4-20250514) is deprecated and scheduled to retire from Anthropic-operated platforms on June 15, 2026. Use Claude Sonnet 4.6 for current integrations.

Full model details →

Model Specs

Released2025-08-01
Context200k

More Models on OpenRouter

Claude 4 OpusClaude Opus 4.1
All models on OpenRouter →

Also available on(3)

Anthropic$3.00/1MVercel AI Gateway$3.00/1MAWS Bedrock$8.00/1M
Compare all providers →

Provider

OpenRouter
OpenRouter

OpenRouter, Inc.

New York, NY, USA