// about Perplexity Pro
Perplexity Pro is the paid tier of Perplexity AI, giving users access to advanced reasoning models including Claude and GPT-4o alongside Perplexity's own models, with higher daily limits and file upload capability. Researchers and knowledge workers use it as a faster alternative to manually searching and cross-referencing sources, since every answer comes with citations to the underlying web pages. Pro subscribers also get access to Perplexity Spaces for organizing ongoing research projects.