Best AI tools for research and learning
From cited web answers to grounded document Q&A and structured courses, these tools accelerate research and learning.
Recommended tools
Perplexity AI
Perplexity is an AI-powered answer engine that searches the web in real time and responds with cited, up-to-date sources. Unlike traditional chatbots, every answer links back to its references, making it a favorite for research, fact-checking, and staying current — with free and Pro tiers available.
NotebookLM
NotebookLM is Google's AI research and note-taking assistant that grounds every answer in the documents you upload, from PDFs to Google Docs and web pages. Its standout feature is generating podcast-style audio overviews of your sources, making it ideal for students, researchers, and knowledge workers.
Google Machine Learning Crash Course
Google's Machine Learning Crash Course is a free, hands-on introduction to machine learning featuring video lessons, interactive visualizations, and coding exercises with real datasets. It covers core concepts from linear regression to neural networks, making it an ideal starting point for developers new to ML.
fast.ai Practical Deep Learning Course
fast.ai offers a free, practical deep learning course that uses a top-down teaching approach — building working models first, then diving into theory. It covers computer vision, NLP, and tabular data, with hands-on notebooks that let developers start training real models from day one.
Claude
Claude is Anthropic's AI assistant for chat, analysis, coding, and document work, known for careful reasoning, long context handling, and the Artifacts feature for interactive content. It offers free and Pro plans, with a reputation for nuanced writing and reliable handling of complex, lengthy tasks.
Notion AI
Notion AI is built directly into the Notion workspace, letting you write and summarize documents, answer questions grounded in your own pages, and automate notes and databases. Its advantage over standalone chatbots is deep workspace context — it knows your projects, wikis, and tasks.