By Jessica Hall
Publication Date: 2026-01-05 12:00:00
How do you know which AI chatbot is the best? Today, we’re putting ChatGPT and Perplexity AI head-to-head. Because they’re designed for different purposes, it’s tough to rate either as unequivocally better than the other. We found that each service has its strengths, and while there’s significant overlap, your use case determines which service you choose.
What Is Perplexity AI?
Perplexity AI is an AI-powered research engine focused on real-time information retrieval and citation-backed answers, with a chatbot “wrapper” that gives it the ability to parse and respond in natural language. ChatGPT, meanwhile, is a conversational AI chatbot designed for reasoning, creativity, coding, and general-purpose assistance.
Where ChatGPT positions itself as a friendly, conversational research assistant, Perplexity cuts straight to the chase with its search-and-summarize approach.
How Do the Models Behind Perplexity AI and ChatGPT Differ?
Both services use a type of artificial neural network known as a large language model (LLM) to formulate and deliver their answers; in fact, they both leverage OpenAI’s GPT foundational models. The biggest difference in their models is visible in their priorities.
ChatGPT uses large language models (GPT‑4, GPT‑4o, etc.) in a mixture-of-experts architecture optimized for reasoning, creativity, and multi-step problem solving. In contrast, Perplexity uses a mix of LLMs, including its own Sonar models and OpenAI models, Claude’s Opus and Sonnet…
