Short answer
Google’s current help pages don’t state a fixed number of Gemini Deep Research queries per month. They say Gemini Apps have limits on daily research requests and on how many requests can run at once. Near your limit, the app can tell you how many requests remain for the day; Google AI Pro and Ultra users get higher limits, but the help page doesn’t give a numeric allowance. So there isn’t a reliable monthly total to quote from that documentation. (support.google.com)
That’s not the same as saying Deep Research is unlimited. Google also describes broader Gemini Apps usage as compute-based: usage depends on prompt complexity, models and features used, and chat length. Those limits refresh every five hours until a weekly limit is reached. (support.google.com)
Why you may see different numbers online
Older articles reported figures such as five reports per month on the free tier and daily caps for paid plans. Treat those as dated reports, not a dependable current monthly allowance. Google’s current Deep Research help page describes a daily request limit and a simultaneous-request limit, but doesn’t publish the numerical daily cap or turn it into a monthly quota. Don’t multiply a reported daily figure by the days in a month: the official page doesn’t promise that number of requests every day or specify a monthly total. (support.google.com)
Plan comparisons also don’t answer the count by themselves. A higher access level means more access, not a stated number of Deep Research reports. And the broader Gemini usage multipliers describe general app limits, not Deep Research queries specifically. (support.google.com)
How to check your app allowance
In Gemini Apps, watch for the Deep Research notice when you’re close to the limit: Google says it can show how many research requests remain for the day. The same help page says there’s also a limit on how many requests you can run simultaneously. That daily notice is more relevant to your account than an older article, but it still doesn’t establish a monthly quota. (support.google.com)
Is Deep Research available through a Gemini API?
Yes, Google documents a Deep Research agent for the Gemini API—but currently labels it a preview, not a generally available production feature. The documented agent runs through the Interactions API, uses background execution, and is not accessed through generate_content. Google’s example starts a research task and polls for completion. (ai.google.dev)
The API agent is a separate route from consumer Gemini Apps limits. The API documentation captured here does not establish a monthly Deep Research quota or a numeric API rate limit, so don’t apply an app-plan allowance to API use—or assume the API is production-ready if your requirements exclude preview features. Check the current API documentation and your project’s applicable limits before relying on it for a production workload. (ai.google.dev)
Bottom line: For Gemini Apps, Google documents daily and concurrent Deep Research limits, but the pages cited here don’t give a fixed monthly count. For the API, Google documents a Deep Research agent in preview, but these sources don’t establish a monthly API allowance.
Sources
Use Deep Research in Gemini Apps - Gemini Apps Help
Gemini Apps limits & feature availability - Gemini Apps Help
Gemini Deep Research agent | Gemini API | Google AI for Developers