This Thursday morning, OpenAI has made a massive upgrade to its flagship product, ChatGPT. Both Elets CIO and Sites@Duke Express confirm that GPT-5.5 Instant is now the new default model for all logged-in ChatGPT users, rolling out globally as of May 5th.

This isn't just a minor tweak. Multiple sources, including Zee News and MSN, highlight that GPT-5.5 Instant is significantly smarter and more efficient. It promises more concise answers, with Zee News reporting 52.5% fewer "hallucinated" claim