Best AI tools for research

ChatGPT

A flexible AI assistant for drafting, analysis, brainstorming, coding help, and everyday knowledge work.

Best for: General-purpose writing, research, analysis, and multimodal help

Claude

A thoughtful assistant especially useful for editing, long-context analysis, and turning messy notes into structured outputs.

Best for: Long-form writing, careful analysis, document review, and coding assistance

Gemini

Google’s AI assistant with strong multimodal capabilities and a natural fit for people already working in Google products.

Best for: Google-native AI assistance across search, docs, Gmail, Android, and multimodal tasks

Perplexity

A research-first AI search engine that keeps sources visible while answering questions.

Best for: Source-backed web research and quick market scans

Grok

xAI’s assistant family: flagship Grok 4.6 model for coding and agents, Grok Bot always-on agents, Grok Build coding agent with Build Mode apps, Grok Imagine image/video, Grok Voice, and real-time X data.

Best for: Coding and agentic work on the newest models, real-time X data answers, always-on Grok Bot agents, and building apps/sites in Build Mode

NotebookLM

Google's document research tool that grounds answers in uploaded files and produces audio overviews.

Best for: Document QDA, study guides, and audio overviews from uploaded sources

DeepSeek

An AI assistant and model provider known for reasoning and coding capabilities with strong price-performance interest.

Best for: Reasoning, coding, and cost-conscious model evaluation

OpenEvidence

A medical knowledge platform that official pages describe as free and unlimited for healthcare professionals, with content agreements involving publishers such as NEJM, JAMA, Nature, NCCN, and Cochrane. It is a research/reference surface, not a substitute for clinical judgment.

Best for: cited medical-literature lookup for verified healthcare professionals

Harvey

An enterprise legal AI platform for law firms and in-house teams. Official pages route buyers to a demo and describe security controls such as SAML SSO, audit logs, and data lifecycle management. It is not a substitute for licensed legal judgment.

Best for: enterprise legal research, drafting, and agent workflows for law firms and in-house teams

CoCounsel Legal

Thomson Reuters’ legal AI assistant grounded in Westlaw content and Practical Law guidance. Official product pages describe research, analysis, and drafting; an official Westlaw plans page lists a starting price for the Westlaw Advantage with CoCounsel Essentials bundle.

Best for: Westlaw- and Practical Law-grounded legal research, document analysis, and drafting

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