Perplexity

Perplexity AI is an AI-chatbot-powered research and conversational search engine that answers queries using natural language predictive text. Launched in 2022, Perplexity generates answers using the sources from the web and cites links within the text response. Perplexity works on a freemium model; the free product uses its Perplexity model based on OpenAI's GPT-3.5 model combined with the company's standalone large language model (LLM) that incorporates natural language processing (NLP) capabilities, while the paid version Perplexity Pro has access to GPT-4, Claude 3, Mistral Large, Llama 3 and an Experimental Perplexity Model. It has garnered about 10 million monthly users.