Model release: GPT-5.5 & OpenAI

Model release Provisional 95% confidence first seen 23 April 2026, 11:00

Type: Model release
Status: Provisional
First seen: 23 April 2026, 11:00
Latest source: 23 April 2026, 20:00
Sources: 2

GPT-5.5 OpenAI Codex GPT-5.4 Pro GPT-5.5 Pro

Source coverage

23 Apr, 11:00 Model release: OpenAI & GPT-5.5 OpenAI official 23 Apr, 20:00 Model release: OpenAI & GPT-5.5 One Useful Thing