OpenAI releases GPT-5.5 Instant, a new default model for ChatGPT

The new GPT-5.5 Instant model will replace GPT-3.5 Instant as the default model for ChatGPT ...
WinBuzzer

OpenAI Makes GPT-5.5 Instant ChatGPT’s Default Model

OpenAI has rolled out GPT-5.5 Instant as ChatGPT's default model, adding memory-source controls, personalization tools, and a ...

OpenAI says GPT-5.5 Instant to be default model for ChatGPT; widens memory sources

OpenAI makes GPT‑5.5 Instant ChatGPT’s default, cutting hallucinations and boosting personalization with memory sources.
Hosted on MSN

OpenAI launches GPT‑5.4 with major upgrades for professional AI use

OpenAI has released GPT‑5.4 across ChatGPT, its API, and Codex, positioning it as its most capable model for professional tasks. The update merges GPT‑5.3‑Codex’s coding strengths with enhanced ...

OpenAI rolls out GPT-5.5 Instant with improved accuracy and reasoning

GPT-5.5 Instant is the updated default model focused on improving factual reliability, reasoning ability, and everyday task ...
BBN Times

OpenAI Releases GPT-5.5 Instant as ChatGPT’s New Default Model

OpenAI has quietly delivered one of the most noticeable upgrades to ChatGPT in recent memory. As of May 5, 2026, GPT-5.5 Instant is now the default model for all logged-in ChatGPT users worldwide, ...
TechBooky

ChatGPT’s New Default Model Is OpenAI’s GPT-5.5 Instant

GPT-5.5 Instant, a new foundation model released by OpenAI earlier today, will take the place of GPT-5.3 Instant as the ...