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): 38.4 index
- Coding Index (artificial-analysis): 74.9 index
- Agentic Index (artificial-analysis): 36.4 index
- Design Arena agenticgamedev (other): 1179 elo · #14
- Design Arena agentichtmlslides (other): 1084 elo · #8
- Design Arena agenticslides (other): 1150 elo · #6
- Design Arena agenticslides(html) (other): 1077 elo · #8
Notes
GPT-5.5 is listed in the EDNA Models directory from the OpenRouter catalogue.
In the AI Pulse
Recent daily briefs from the Enterprise DNA AI Pulse that mention this. The short daily read on what is actually happening in AI.
- Frontier Labs Watch28 Aug 2026
DeepMind alumni claim their small orchestration team beats Opus 4.8 and GPT-5.5 at reproducing research
- AI Trends Pulse30 July 2026
OpenAI cut GPT-5.6 pricing hard
- Frontier Labs Watch22 July 2026
xAI claims Grok 4.5 plus its "Grok Build" agent beat GPT-5.5 and Claude Opus 4.8 on an independent real-work benchmark (GDPval+), with the widest margins in legal and healthcare tasks.
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