OpenAI claims ChatGPT’s new default model hallucinates way less

OpenAI’s newest default model for ChatGPT might not make stuff up as much. Hallucinations have been an ongoing problem for AI models, but OpenAI says its new GPT-5.5 Instant model has “significant improvements in factuality across the board.” The company claims that, based on “internal evaluations,” GPT-5.5 Instant produced “52.5% fewer hallucinated claims” than its Instant model for GPT-5.3 “on high-stakes prompts covering areas like medicine, law, and finance.” GPT-5.5 Instant also “reduced inaccurate claims by 37.3% on especially challenging conversations users had flagged for factual errors.” OpenAI also claims that GPT-5.5 Instant is “more capable across everyday tasks,” like analyzing image uploads and knowing when to turn to the web for an answer. GPT-5.5 Instant has “tighter and more to-the-point” responses and will avoid using “gratuitous emojis.” With GPT-5.5 Instant, ChatGPT is now “more effective” at pulling in context from things like previous chats and your Gmail to give you more personalized responses, too. (This is a feature that Google is investing heavily in for Gemini as well.) And for all ChatGPT models, a new “memory sources” feature will let the chatbot show what context was used to inform personalized responses, and you can delete or correct information if you need. …