OpenAI vs OpenRouter

Access to GPT-4o, GPT-4o mini, and other frontier language models

o1 and o3 series models with advanced reasoning capabilities for complex problems

Process text, images, audio, and video inputs with unified models

Structured outputs and tool use for building agents and workflows

Build AI assistants with code interpreter, file search, and custom tools

Customize models on your own data for specialized use cases

Single API endpoint for 300+ models from dozens of providers

Requests automatically route to the best available provider for each model

Drop-in replacement using the OpenAI SDK format

Routes to the fastest or cheapest provider based on your preference

Pay per token with no minimum commitments or subscriptions

Reduced pricing for cached input tokens on supported models