Using Claude Sonnet 5 on OpenRouter

Implementation guide · Claude 5 · Anthropic

Serverless

OpenRouter exposes Claude Sonnet 5 through model ID anthropic/claude-sonnet-5. 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-5 — see the documentation for request format.
  3. 3
    You'll be billed $2.00/1M input, $10.00/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$2.00
Output tokens$10.00
Query$10.00

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsCode ExecutionPrompt CachingBatch API

About Claude Sonnet 5

Claude Sonnet 5 is Anthropic's next-generation Sonnet model for agentic coding, tool use, computer use, and professional work. It is a proprietary decoder-only model with a 1M-token context window, 128K max output, multimodal vision, adaptive thinking, function calling, structured outputs, prompt caching, and Batch API support. It is available through the Claude API, AWS Bedrock, Google Cloud Vertex AI, Microsoft Foundry preview, and OpenRouter. Anthropic lists durable standard pricing at $3/1M input and $15/1M output tokens, with introductory $2/$10 pricing through 2026-08-31.

Full model details →

Model Specs

Released2026-06-30
Context1m
ArchitectureDecoder Only
Knowledge cutoff2026-01

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Also available on(4)

Anthropic$2.00/1MGCP Vertex AI$2.00/1MAWS Bedrock
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Provider

OpenRouter

OpenRouter, Inc.

New York, NY, USA