Model UpdatesX：OpenAI
GPT-5.5 Instant New Version
X：OpenAI2026-06-24T18:00:21.000Z
OpenAI gave GPT-5.5 Instant a personality overhaul, making conversations more natural and interesting. The new version better understands intent behind questions and handles complex constraints more reliably.
Source: X：OpenAI· 2026-06-24T18:00:21.000Z