this new feature in Canvas that will appeal to web designers and front-end developers

With this update, OpenAI isn't just catching up — it's redefining expectations. Designers gain a tool to quickly iterate on mockups, while front-end developers benefit from an integrated sandbox to test React snippets without launching Vite or Webpack.

But be careful: some users point out practical limitations. React rendering remains basic (no access to external libraries like Three.js), and error handling still relies heavily on manual fixes. Not to mention cost — access to Canvas with o1 (essential for complex prototypes) requires a ChatGPT Plus subscription.