… What's more, that model, GPT-5.4 mini, even offers performance that approaches GPT-5.4 in a handful of areas. As a Free or Go user, you can access 5.4 mini by selecting "Thinking" from ChatGPT's plus menu. …
ChatGPT's new default model is more factual and better at personalization By Igor Bonifacic May 5, 2026 1:59 pm EST Hot on the heels of its recent GPT-5.5 release , OpenAI is updating ChatGPT's default model to GPT-5.5 Instant. …
… Find and fix vulnerabilities earlier with Daybreak pic.twitter.com/yobOSWYeWP — OpenAI @OpenAI May 11, 2026 Daybreak will use GPT-5.5 for general purposes and GPT-5.5 with Trusted Access for Cyber for most defensive security workflows, including "secure code review, vulnerability triage, malware an…
… With the launch of GPT 5.2 late last year and GPT-5.3-Codex in February, OpenAI significantly boosted the speed and reasoning capabilities of Codex, giving developers a tough choice between ChatGPT and Claude Opus. …
… For the initiative's first week, Trail of Bits' security engineers worked with 19 open-source projects using OpenAI's Codex and GPT‑5.5‑Cyber models. …
… In a blog post published Wednesday, the company explains it began to notice a change in ChatGPT following the release of GPT-5.1 last November. …
