Google quietly dropped something interesting last week. They updated their Deep Research agent (available via Gemini API) and introduced a "Max" tier built on Gemini 3.1 Pro.
What it actually does: you give it a topic, it autonomously searches the web (and your private data via MCP), reasons over the sources, and produces a fully cited, professional-grade report — including native charts and infographics.
Two modes:
Deep Research — faster, lower latency, good for real-time user-facing apps
Deep Research Max — uses extended compute, iterates more, designed for background/async jobs (think: nightly cron that generates due diligence reports for analysts by morning)
The MCP support is the most interesting part to me. You can point it at proprietary data sources — financial feeds, internal databases — and it treats them as just another searchable context. They're already working with FactSet, S&P Global and PitchBook on this.
Benchmarks show a significant jump in retrieval and reasoning vs. the December preview. They also claim it now draws from SEC filings and peer-reviewed journals and handles conflicting evidence better.
So what do you think, is it another trying or game changer 😅
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