Google Research has opened Deep Review worldwide, making its AI document-review system available for long, technical files. The company says users can submit two documents a week for free; people with a Gemini API key can get higher usage limits and connect through an API.
The release expands a research-paper review tool into other kinds of knowledge documents. Google says Deep Review can examine design plans, presentations, legal agreements and financial documents. It is an evolution of the Paper Assistant Tool, which gave private, opt-in feedback to authors during pilots with four computer-science conferences. Google says more than 16,000 submissions took part and that the feedback was kept separate from official conference decisions.
How Deep Review examines a document
Google describes a four-stage process. First, the system splits a document into logical sections. It then assigns more computing effort to dense or difficult sections and sends specialized AI reviewers to inspect them in parallel. Each reviewer can refer to the full document, which lets it follow connections across sections. A final system combines the reports, checks for inconsistencies and searches external sources to ground factual claims.
Google says Deep Review can check mathematical statements and logical consistency, assess experiments and supporting evidence, and suggest revisions. The company says the tool is powered by Gemini 4 Argon and is meant to assist technical review while leaving higher-level judgments to people.
Access and document handling
At launch, users can submit PDFs and plain text. Google says support for reviewing several related files together is coming soon. The launch post does not specify the price or exact usage limit for people who connect a Gemini API key.
Google says uploaded documents are not used to train, fine-tune or improve its models. It says files are stored for one year so users can view them in the Deep Review interface.
Sources
Illustrative image: Pavel Danilyuk/Pexels, photo page; used under the Pexels license. It does not depict Deep Review or a Google product.