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Tom’s Guide
Tom’s Guide
Technology
Amanda Caswell

ChatGPT-5.5 Instant is now the default — I tested 7 prompts and the answers got instantly shorter and smarter

Close up of a person wearing a grey jumper using a blue iPhone.

OpenAI just launched ChatGPT-5.5 Instant to all users and this new model promises less. Less repetition, less time wasted and less fluff so users can get the answers they really want without more prompting.

Every new release and update means users are promised more. Whether it's more power or more features, we've grown to expect extra. But the latest release of ChatGPT-5.5 Instant has flipped this idea completely.

According to OpenAI’s internal testing, the model delivers tighter answers while reducing hallucinations by over 50% in high-stakes scenarios. Considering that ChatGPT-5 was known to be wrong 1 in 4 times, this update is huge. For real world usage, this means responses that get to the point faster, match the scale of your question, and actually feel useful.

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