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

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

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

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 ...

OnenAI rolls out GPT 5.5 Instant on Tuesday as a default for Plus and Pro users on the web. The company said the new model will have fewer hallucinated claims and will now show where its responses are ...

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, ...

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

Users may notice fewer errors as the chatbot’s default switches to GPT-5.5 Instant, which OpenAI says cuts hallucinations by ...