GPT-5.5
by OpenAI
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on ha
Models
GPT-5.5
Added 10 July 2026
Overview
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
How to use / API access
Call via OpenRouter with model id `openai/gpt-5.5`.
- openrouter ·
openai/gpt-5.5Docs
OpenRouter id: openai/gpt-5.5
Benchmarks
- Intelligence Index (artificial-analysis) : 54.8 index
- Coding Index (artificial-analysis) : 74.9 index
- Agentic Index (artificial-analysis) : 44.9 index
- Design Arena agenticgamedev (other) : 1191 elo · #10
- Design Arena agentichtmlslides (other) : 1084 elo · #9
- Design Arena agenticslides (other) : 1150 elo · #7
- Design Arena agenticslides(html) (other) : 1077 elo · #9
Notes
GPT-5.5 is listed in the EDNA Models directory from the OpenRouter catalogue.
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