<ul data-eligibleForWebStory="true">AI can be a powerful tool for fast prototyping when building a new product to test hypotheses.Tools like ChatGPT or Claude can be used in the prototyping process.AI can help in building web prototypes using tools like Replit's Ghostwriter or Vercel AI SDK paired with GPT models.Code chunks can be refined live with AI code co-pilots for efficient development.AI can also be utilized to simulate realistic personas for testing purposes.While not perfect substitutes, AI personas can provide valuable insights for product development.Feedback from users should be sought to improve the prototype continuously.The goal of prototyping is to learn and iterate quickly rather than aiming for perfection.