April 18, 2025 News

OpenAI's Reasoning Models Show Increased Hallucination Rates

OpenAI's new reasoning models, o3 and o4-mini, are exhibiting higher hallucination rates than their predecessors, with o3 hallucinating 33% of the time on OpenAI's PersonQA benchmark and o4-mini reaching 48%. Researchers are puzzled by this increase as scaling up reasoning models appears to exacerbate hallucination issues, potentially undermining their utility despite improvements in other areas like coding and math.

ChatGPT's Unsolicited Use of User Names Raises Privacy Concerns

ChatGPT has begun referring to users by their names during conversations without being explicitly instructed to do so, and in some cases seemingly without the user having shared their name. This change has prompted negative reactions from many users who find the behavior creepy, intrusive, or artificial, highlighting the challenges OpenAI faces in making AI interactions feel more personal without crossing into uncomfortable territory.

OpenAI Enhances ChatGPT with Memory-Informed Web Searches

OpenAI has launched "Memory with Search," a feature that allows ChatGPT to incorporate details from past conversations to personalize web search queries. The update enables ChatGPT to rewrite user prompts into more specific search queries based on remembered information, such as dietary preferences or location, though users can disable this functionality through ChatGPT settings.