Research AI tools

3 apps

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All Agents Coding Research Image Video Audio Productivity

Perplexity
Real-time answer engine synthesizing live sources with inline citations.
ResearchFreemium 4.7 out of 5
NotebookLM
Source-grounded workspace transforming dense PDFs into interactive briefs.
ResearchFreeNew 4.7 out of 5
Google AI Studio
Fast developer sandbox & free tier for Gemini 4 Carbon and Hydrogen.
ResearchFreeNew 4.7 out of 5

§ Research guide & links

Best AI research tools, with verifiable citations.

Research assistants pair live web retrieval or private document indexes with long-context reasoning models so every claim is backed by checkable sources.

Model leaderboard Analysis news Free AI tools Vigas API tools API prices

What makes a great AI research tool?

Reliable inline citations, faithful extraction from long PDFs and papers, and predictable cost per deep-research run.

Can I build my own cited research assistant with Vigas?

Yes — check the Text and Overall leaderboards alongside 1M+ context models in the gateway to pick the best model for long documents.

Perplexity

NotebookLM

Google AI Studio

Best AI research tools, with verifiable citations.

What makes a great AI research tool?

Can I build my own cited research assistant with Vigas?