GPT-5

GPT-5 is OpenAI's flagship model, introduced in August 2025 as a unified system that blends a fast default responder with a deeper reasoning mode that activates when a question needs more careful thought. OpenAI describes it as its smartest, fastest, and most useful model to date, with built-in thinking that aims to put expert-level intelligence into the hands of every ChatGPT user rather than gating it behind a paid preview. The same launch materials frame GPT-5 as a significant leap over earlier generations, citing state-of-the-art performance across coding, math, writing, health, and visual perception, alongside broad usefulness in domains such as finance and law.

Practically, GPT-5 was positioned for everyday expert assistance: math and science problem solving, code generation and explanation, long-form writing, and visual tasks, with the ability to know when to answer quickly and when to deliberate harder. It launched with dedicated surfaces for developers and businesses, signaling an intent to serve production applications beyond consumer chat. Notably, the original GPT-5 announcement pages now point readers to OpenAI's newer flagship, indicating that GPT-5 has been superseded at the top of the lineup while remaining a widely deployed, general-purpose reasoning model with strong cross-domain competence.