OpenAI's GPT-5 model has recently launched for most users, with Apple planning to integrate this model into upcoming OS updates for iOS, iPadOS, and macOS. These updates are anticipated to arrive in September based on past trends. GPT-5 offers a significant reduction in hallucination rates and automates the selection of reasoning-optimized models depending on user inputs. While paid users of ChatGPT can manually select models for their inquiries, free users will not have this option, leaving the system to determine the best fit for their prompts. Further details on iOS integration remain uncertain.
OpenAI's GPT-5 model went live for most ChatGPT users this week, with Apple set to switch to GPT-5 in iOS 26, iPadOS 26, and macOS Tahoe 26. Apple has not announced release dates, but updates typically come in September.
GPT-5 purports to hallucinate 80 percent less and introduces a significant rework in how OpenAI positions its models, such as automatically choosing reasoning-optimized modes based on user prompts.
Paid ChatGPT users will have manual control over which model to choose for prompts, while free users must accept the model selected by ChatGPT.
It remains unclear how the implementation of GPT-5 will work in iOS, including whether it will use non-reasoning modes consistently.
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