OpenRouter · gpt-5.5

API GatewayOpenAI compatible

Unified API gateway providing access to 200+ models from multiple providers with standardized pricing.

Active models
370+ 355 deprecated
Families
97
Headquarters🇺🇸 New York, NY
Founded2023
Latest release2026-10-28
API Base URL
Modelsopenrouter.ai/models
Capabilities
Model
OpenAI: GPT-5.5openai/gpt-5.5
OpenAI: GPT-5.5 Proopenai/gpt-5.5-pro