- OpenAI says GPT-5.5 Instant reduces hallucinations by 52.5%
- ChatGPT responses are now shorter, cleaner and less overformatted
- New Memory Sources Show Exactly What ChatGPT Knows About You
You think you know ChatGPT, right? He can be terribly sycophantic, producing endless lists of bullet points in response to your questions, and sometimes even going overboard with annoying emojis. Worst of all, he occasionally hallucinates, essentially making things up.
Well, OpenAI is trying to change all that overnight.
GPT-5.5 Instant is now rolling out to all ChatGPT users everywhere, including free users. The previous GPT-5.3 Instant model will remain available to paid users through the Setup menu for the next three months.
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Key features of GPT-5.5 Instant include 52.5% fewer claims of hallucinations in high-risk messages in areas such as medicine, law, and finance, along with stronger performance in image reasoning, science, and mathematics. Answers are also designed to be clearer, shorter, and less overformatted.
OpenAI also says that GPT-5.5 Instant has “a more natural conversational tone and better use of the context you’ve already shared when personalization can help.”
That means ChatGPT is now better at using relevant context from previous chats, uploaded files, and connected Gmail accounts.
Manage memory sources
New in GPT-5.5 Instant are memory sources. These give you more visibility into the context that helped customize a response and allow you to manage or delete that memory source if it provides incorrect information.
When a response is custom, you can now click the ‘Sources’ option at the end of the response to see what context was used. That could include saved memories, previous chats, or connected services.
You can then delete or correct outdated information using the three-dot menu next to the source.
So if ChatGPT has incorrect information about where you live, for example, you can click the menu button and select “Make a Correction” to update it.
Memory fonts are rolling out to all ChatGPT consumer plans on the web and will be coming to mobile devices soon. OpenAI says the availability of specific customization sources may vary by region.
What is it like to use GPT-5.5 Instant?
I’ve been using GPT-5.5 Instant today and the first thing I noticed was how concise it felt compared to the previous version I had been using, GPT-5.3 Instant. And yes, that means OpenAI has completely bypassed GPT-5.4 Instant in its jump to GPT-5.5.
Ask GPT-5.5 Instant for something and it will usually give you exactly what you asked for without anything superfluous. He no longer feels desperate to impress you every few sentences.
Nor is it customary to end responses with unnecessary follow-up questions or overzealous flourishes. Everything looks cleaner, shorter and less overformatted.
While GPT-5.5 Instant is available to all users, improved personalization of past chats, files, and connected Gmail accounts is currently rolling out only to Plus and Pro users on the web. OpenAI says mobile support is coming soon, with plans to expand the feature to Free, Go, Business, and Enterprise users in the coming weeks.
GPT-5.5 Instant is not the type of update that produces dramatic viral videos. Instead, it seems designed to remove the friction from everyday use, making ChatGPT feel calmer, cleaner, and a little less eager to get through every second of the conversation. I prefer it.
This may not sound revolutionary, but for people who use AI tools every day, it could end up being one of the biggest updates to OpenAI yet.
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