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Last week, OpenAI managed to stop ChatGPT from talking about goblins all the time. This week, there’s a whole new model for users to play with.
The company announced in a blog post on Tuesday that ChatGPT 5.5 Instant has begun rolling out to all users as the new default model for the popular AI chatbot. The new model is a follow-up to GPT 5.5, which was released in April.
GPT-5.5 Instant replaces 5.3 Instant, which will remain available for the next three months for paid users but will otherwise be sunsetted.
Unlike Claude Opus 4.7 from Anthropic and GPT-5.5, which are only available to paid customers, GPT-5.5 Instant is “available to everyone.” OpenAI says it should produce fewer hallucinations and better overall results for everyday ChatGPT usage.
“This update makes everyday interactions more useful and more enjoyable: stronger and tighter answers across subject areas, a more natural conversational tone, and better use of the context you’ve already shared when personalization can help,” OpenAI’s blog post said.
According to OpenAI, GPT-5.5 Instant produced 52.5 percent fewer hallucinated claims in internal testing than GPT-5.3 in “high stakes” topics like law, finance, and medicine. In addition, the new model “reduced inaccurate claims by 37.3% on especially challenging conversations users had flagged for factual errors.”
The company also says the new model is better at deciding when to use web search for a prompt and analyzing image uploads than before. The new model is also allegedly more concise in its answers, while also maintaining something of a personality in how it talks to the user. GPT-5.5 Instant should also be better at understanding and referencing context from a connected Gmail account and other integrations to provide quality answers.
And, again, most importantly, it should avoid mentioning goblins unless absolutely necessary.
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Disclosure: Ziff Davis, Mashable’s parent company, in April 2025 filed a lawsuit against OpenAI, alleging it infringed Ziff Davis copyrights in training and operating its AI systems.
Topics Artificial Intelligence ChatGPT OpenAI
Alex Perry is a tech reporter at Mashable who primarily covers video games and consumer tech. Alex has spent most of the last decade reviewing games, smartphones, headphones, and laptops, and he doesn’t plan on stopping anytime soon. He is also a Pisces, a cat lover, and a Kansas City sports fan. Alex can be found on Bluesky at yelix.bsky.social.
