tech
May 5, 2026
GPT-5.5 Instant System Card
GPT‑5.5 Instant is our latest Instant model, and explained in our blog. The comprehensive safety mitigation approach for this model is similar to previous models in this series, but this is the first Instant model that we are treating as High capability in our Cybersecurity and Biological & Chemical Preparedness categories, and implementing appropriate safeguards.
TL;DR
- GPT-5.5 Instant is the newest Instant model from OpenAI.
- Safety mitigation for GPT-5.5 Instant is similar to prior models in its series.
- It is the first Instant model classified as High capability in Cybersecurity and Biological & Chemical Preparedness.
- Appropriate safeguards are being implemented for these high-capability categories.
- GPT-5.5 Instant is referred to as gpt-5.5-instant.
- There is no GPT-5.4 Instant model.
- The main model for comparison is GPT-5.3 Instant.
- GPT-5.5 Thinking is a separate model to avoid confusion.