Best for Research
Tools that answer with sources, papers, or a pile of files you already have.
Editorial rank 1
Perplexity
Answers with links you can check.
The fastest way to get an answer with sources you can click. Good for “what is the state of X” and for current events. It will still cite a weak page with a straight face, so you read the links.
Editorial rank 2
NotebookLM
Research notebook grounded in files you upload.
Best when you already have the sources. Upload the papers, the transcripts, the notes, and it stays inside them. Useless as a web search engine, which is the point.
Editorial rank 3
Elicit
Literature review over academic papers.
Built for literature reviews. It finds papers and pulls columns of methods and findings instead of writing you a blog post. Narrow on purpose, and not a daily web research tool.
Editorial rank 4
Consensus
Answers tied to scientific papers.
Useful for “what do studies say” in science and medicine, with the answer tied to papers. Thin outside that lane.
Editorial rank 5
ChatGPT
OpenAI's general-purpose chat model.
GPT-6 can start an answer while it keeps working, which helps a long brief. It is still more of an essay than Perplexity, and you should check the citations. Hard science problems are a different job: Gemini 4 Argon, generally available on 13 October 2026, is built for those.