OpenAI has introduced GPT‑5, which it describes as its “best AI system yet and a significant leap in intelligence over all its previous models”, featuring state-of-the-art performance across coding, math, writing, health, visual perception, and more.
According to OpenAI, GPT‑5 is a unified system that knows when to respond quickly and when to think longer to provide expert-level responses. GPT‑5 is available to all users, with Plus subscribers getting more usage, and Pro subscribers getting access to GPT‑5 pro, a version with extended reasoning for even more comprehensive and accurate answers.
One unified system
According to OpenAI, GPT‑5 is a unified system with a smart, efficient model that answers most questions, a deeper reasoning model (GPT‑5 thinking) for harder problems, and a real‑time router that quickly decides which to use based on conversation type, complexity, tool needs, and your explicit intent (for example, if you say “think hard about this” in the prompt). The router is continuously trained on real signals, including when users switch models, preference rates for responses, and measured correctness, improving over time. Once usage limits are reached, a mini version of each model handles remaining queries. OpenAI says, in the near future, it plans to integrate these capabilities into a single model.
The company says, “GPT‑5 not only outperforms previous models on benchmarks and answers questions more quickly, but – most importantly – is more useful for real-world queries. We’ve made significant advances in reducing hallucinations, improving instruction following, and minimizing sycophancy, while leveling up GPT‑5’s performance in three of ChatGPT’s most common uses: writing, coding, and health.
Coding
Against a background of competitor models making inroads into the coding space, OpenAI says GPT‑5 is its strongest coding model to date.
According to the company, “It shows particular improvements in complex front‑end generation and debugging larger repositories. It can often create beautiful and responsive websites, apps, and games with an eye for aesthetic sensibility in just one prompt, intuitively and tastefully turning ideas into reality. Early testers also noted its design choices, with a much better understanding of things like spacing, typography, and white space. See here for full details on what GPT‑5 unlocks for developers.”
In the area of creative expression and writing, OpenAI claims, “GPT‑5 is our most capable writing collaborator yet, able to help you steer and translate rough ideas into compelling, resonant writing with literary depth and rhythm. It more reliably handles writing that involves structural ambiguity, such as sustaining unrhymed iambic pentameter or free verse that flows naturally, combining respect for form with expressive clarity. These improved writing capabilities mean that ChatGPT is better at helping you with everyday tasks like drafting and editing reports, emails, memos, and more.”
Health
The company also makes the claim for GPT‑5 being its “best model yet for health-related questions, empowering users to be informed about and advocate for their health.”
“The model scores significantly higher than any previous model on HealthBench, an evaluation we published earlier this year based on realistic scenarios and physician-defined criteria,” says OpenAI. “Compared to previous models, it acts more like an active thought partner, proactively flagging potential concerns and asking questions to give more helpful answers. The model also now provides more precise and reliable responses, adapting to the user’s context, knowledge level, and geography, enabling it to provide safer and more helpful responses in a wide range of scenarios. Importantly, ChatGPT does not replace a medical professional – think of it as a partner to help you understand results, ask the right questions in the time you have with providers, and weigh options as you make decisions.”
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