Google opens Deep Review, its agentic document checker, to the public

Google Research released Deep Review on Oct. 14, offering two free reviews a week of specs, papers and contracts, with more via your own Gemini API key.

Google Research has released Deep Review publicly. The agentic system checks long documents for logical gaps, mathematical errors and unsupported claims. It grew out of the Paper Assistant Tool that Google piloted on more than 16,000 opt-in submissions at STOC, ICML, NeurIPS and ICLR, and it now targets design docs, presentations, and legal and financial documents. If AI is drafting your specs faster than you can check them, this is a second reader built for that job.

Google's post describes four stages. The document is split into sections, compute is allocated by difficulty, agents check sections in parallel with the full document in view, and a synthesis agent merges the findings. R&D World reports that the synthesis step uses Google Search to catch hallucinations, and that a review takes 10 to 20 minutes.

Access: every user gets two free reviews a week. GIGAZINE says you can connect a Gemini API key for higher limits or use the Deep Review API. NeoTeo says Google's FAQ estimates about $3 for a 40-page document at Low effort, or about $20 at Extra High with Gemini 4 Argon, with no extra Deep Review fee. The supported formats are unclear. GIGAZINE reports only PDF and plain text at launch, while NeoTeo saw Google Docs and Slides listed on the product page a day later. Multi-file review is announced, not shipped.

The accuracy numbers are all Google's. R&D World cites the preprint: 89.7% of 29 known errors across 26 papers, against 55.2% for a single Gemini 3.1 Pro pass. It also notes that pilot users saw valid proofs flagged as wrong. Google says uploads aren't used for training but are kept for one year. Treat its findings as leads to verify, not verdicts.

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