Here's everything in GPT-5 that's new and different than OpenAI's previous AI models
Briefly

OpenAI has launched GPT-5, touted as its smartest and fastest model yet, designed to be user-friendly. It features a real-time router that automates model selection for various tasks, streamlining interaction. Users can now select from four distinct personalities—cynic, robot, listener, and nerd—making conversations feel more natural. Additionally, GPT-5 significantly reduces hallucinations, with claims of being 45% less prone to factual errors than its predecessor, GPT-4o. Although it is an improvement, the model continues to exhibit some inaccuracies.
OpenAI has released GPT-5, its smartest and fastest generative AI model, aimed to enhance user interaction through built-in thinking and automated tool selection.
GPT-5 introduces a real-time router that automatically selects the appropriate model for different tasks, eliminating the need for user decision-making.
Users can now interact with ChatGPT through four distinct pre-set personalities: cynic, robot, listener, and nerd, enhancing the contextual nature of conversations.
OpenAI claims GPT-5 has significantly reduced the frequency of factual errors, being 45% less likely to hallucinate compared to GPT-4o.
Read at Fortune
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