Perplexity allows users to switch between multiple AI models within the same platform, unlike ChatGPT which focuses on its own GPT models.

Perplexity's platform uniquely offers access to various AI models such as its own Sonar, Google's Gemini, Anthropic's Claude, and OpenAI's GPT-4. This model-switching capability lets users compare how different AI engines answer questions without juggling accounts or learning new interfaces. It provides a broader perspective and flexibility that ChatGPT's single-ecosystem approach does not currently provide.