This Tuesday morning, OpenAI announced a significant update to ChatGPT, making its new GPT-5.5 Instant model the default for all users. Both TechCrunch and Seeking Alpha confirm this update aims to drastically improve accuracy and personalize user interactions, especially in sensitive fields like law and medicine.

OpenAI's GPT-5.5 Instant scored 81.2 on the AIME 2025 math exam, a sharp increase from its predecessor's 65.4. It also achieved 76.0 on the MMMU-Pro multimodal reasoning test, demonst