Hot on the heels of its recent GPT-5.5 release , OpenAI is updating ChatGPT's default model to GPT-5.5 Instant. OpenAI touts GPT-5.5 as producing 52.5 percent fewer hallucinated claims in internal testing, and 37.3 percent fewer inaccurate claims when taking on conversations ChatGPT users had flagged for factual errors. At the same time, OpenAI says it designed the new model to generate more direct responses, "while keeping the warmth and personality that makes ChatGPT enjoyable to use." GPT-5.5 Instant is also allegedly better at asking fewer unnecessary followup questions and should generate less cluttered outputs, in part thanks to more subdued emoji use. Separately, OpenAI has made the new model faster at searching uploaded files, connected Gmail accounts and prior ChatGPT conversations to generate personalized responses. The upgrade should translate to users needing to repeat themselves less often.…