Apple said it will upgrade the ChatGPT capabilities baked into Apple Intelligence by adopting OpenAI’s newly released GPT-5 model in iOS 26, iPadOS 26 and macOS Tahoe 26. The switch, first disclosed to the website 9to5Mac and confirmed by several technology outlets on 8 August, replaces the GPT-4o engine that currently handles Apple’s optional ChatGPT integration across recent iPhones, iPads and Macs. The software updates are scheduled to reach the public next month, coinciding with the expected debut of the iPhone 17 lineup. As with the current implementation, users will have to opt in before Siri or other system features route queries to ChatGPT, and the hand-off will remain free of account requirements, though linking an OpenAI subscription will unlock higher-tier benefits. OpenAI launched GPT-5 on 7 August, touting an 80 percent reduction in hallucinations and 45 percent fewer factual errors compared with GPT-4o, as well as faster reasoning and expanded multimodal abilities. The model is already available to roughly 700 million weekly ChatGPT users through OpenAI’s own interface. Apple said privacy protections introduced last year will stay in place: user IP addresses are masked and requests handled by ChatGPT are not stored by OpenAI. Beyond the model swap, iOS 26 is set to add Live Translation in FaceTime and Messages, plus broader Visual Intelligence search, as Apple continues to position its on-device AI features against rival offerings from Google and Samsung.