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Research comparison

OpenRouter API vs OpenAI API

OpenRouter API is a multi-provider routing layer with an OpenAI-compatible interface, while OpenAI API is OpenAI's first-party platform for its own models and developer services.

Verified Oct 3, 202626 evidence sources
API

OpenRouter API

OpenRouter API is an OpenAI-compatible model-routing API that exposes hundreds of models from many providers through a single endpoint and account.

Provider
OpenRouter
Categories
LLM APIs
Model links
0
API links
0
API

OpenAI API

OpenAI API provides programmatic access to OpenAI models through the Responses API, Realtime API, batch processing, and other model and media endpoints.

Provider
OpenAI
Categories
LLM APIs
Model links
7
API links
0

Structured facts

Entity profiles

These fields come from each entity record and are kept separate from the curated comparison notes below.

OpenRouter API

Entity type
API
Status
Active
Verified
Oct 3, 2026
Styles
Rest, Sdk
Authentication
Bearer Token
SDKs
TypeScript, Python, Go
OpenAI compatible
Yes
Pricing
Usage Based

OpenAI API

Entity type
API
Status
Active
Verified
Oct 3, 2026
Styles
Rest, Websocket, Sdk
Authentication
Bearer Token
SDKs
JavaScript, TypeScript, Python, C#, Java, Go, Ruby
OpenAI compatible
Yes
Pricing
Usage Based

Editorial comparison

Key differences

These rows are curated comparison data, distinct from automatically aggregated graph relationships.

Compatibility
OpenRouter API

OpenAI-compatible chat and related endpoints

OpenAI API

First-party Responses and other OpenAI endpoints

Official SDKs listed here
OpenRouter API

TypeScript, Python, Go

OpenAI API

JavaScript/TypeScript, Python, C#, Java, Go, Ruby

Knowledge graph

Connected models and APIs

OpenRouter API

Models

No model links in the current graph.

APIs

No API links in the current graph.

OpenAI API

Models
GPT-5.6 LunaGPT-5.6 SolGPT-5.6 TerraGPT-6 AstraGPT-6 LunaGPT-6 SolGPT-6.1 Sol
APIs

No API links in the current graph.