Using GPT-5.5 on OpenRouter

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-5.5 — see the documentation for request format.
3. 3
   You'll be billed $5.00/1M input, $30.00/1M output tokens. See full pricing.

Code Examples

About OpenRouter

OpenRouter provides a unified interface for Large Language Models with better pricing, improved uptime, and no subscription requirements. Route across providers for cost optimization and reliability.

Multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.

Pricing on OpenRouter

Capabilities

About GPT-5.5

GPT-5.5 is OpenAI's fully retrained agentic model, released April 23, 2026. Optimized for agentic coding, computer use, knowledge work, and early scientific research. Achieves 82.7% on Terminal-Bench 2.0, 84.9% on GDPval, and 58.6% on SWE-Bench Pro. Individual factual claims are 23% more likely to be correct versus GPT-5.4, with factual errors 3% less frequent. Uses fewer tokens than GPT-5.4 for equivalent tasks. Supports text and image inputs. Available to ChatGPT Plus, Business, and Enterprise subscribers; API access coming soon. Model ID: gpt-5.5.