Using o3 on OpenRouter

Implementation guide · o3 · OpenAI

Serverless

OpenRouter exposes o3 through model ID openai/o3. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-15. 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 openai/o3 — see the documentation for request format.
  3. 3
    You'll be billed $2.00/1M input, $8.00/1M 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$8.00

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsCode ExecutionPrompt CachingBatch API

About o3

OpenAI o3 reasoning model with advanced multi-step problem-solving capabilities.

Full model details →

Model Specs

Released2025-04-16
Context200k
ArchitectureDecoder Only
Knowledge cutoff2024-06

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Also available on(2)

OpenAI API$2.00/1MVercel AI Gateway$2.00/1M
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Provider

OpenRouter

OpenRouter, Inc.

New York, NY, USA