LLM Reference
OpenRouter

Using GPT-5 Nano on OpenRouter

Implementation guide · GPT-5 · OpenAI

Serverless

OpenRouter exposes GPT-5 Nano through model ID openai/gpt-5-nano. 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/gpt-5-nano — see the documentation for request format.
  3. 3
    You'll be billed $0.05/1M input, $0.40/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$0.05
Output tokens$0.40

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsCode ExecutionPrompt CachingBatch API

About GPT-5 Nano

Fastest, cheapest GPT-5 variant for summarization and classification tasks. Also available via Realtime API.

Full model details →

Model Specs

Released2025-08-07
Context400k
ArchitectureDecoder Only
Knowledge cutoff2024-05

More Models on OpenRouter

GPT-5.2GPT-5GPT-5 MiniGPT-5 ChatGPT-5 CodexGPT-5 Pro
All models on OpenRouter →

Also available on(3)

Replicate API$0.05/1MOpenAI API$0.05/1MVercel AI Gateway$0.05/1M
Compare all providers →

Provider

OpenRouter
OpenRouter

OpenRouter, Inc.

New York, NY, USA