What Is Deep Research?

Updated November 2, 2026 — Le Chat Is Now Vibe. Since May 28, 2026, Le Chat has been called Vibe (still at chat.mistral.ai): a single agent for work and code, with your conversations, settings, and subscriptions carried over. The legacy Le Chat experience remains accessible in Chat mode; in Work mode, agents are now skills (invoked with @), memories are the knowledge base, and deep search is the Deep Research skill. Plans are now Mistral Free, Pro, Team, and Enterprise. This lesson now uses the name Vibe; some menus described here may have changed names or locations.

AI-Powered Deep Research

Deep Research is one of Vibe’s most powerful features, and arguably the most misunderstood. Ordinary web search returns links you must read, sort, and cross-reference yourself. Deep Research does this work for you: it conducts an autonomous investigation, scans dozens of sources, cross-references the information it finds, and produces a structured report where every key claim links to a verifiable source.

The difference isn’t about speed; it’s about nature. You don’t receive an answer; you receive a documented dossier. A question that would have cost you half a day of reading and sorting becomes an actionable document in minutes, while you do something else. Vibe stops being an interlocutor and becomes a research assistant.

What Happens While You Wait

Three steps happen in sequence without your intervention. Vibe starts by breaking your question down into sub-questions. If you ask “What is the state of the European AI market in 2026?”, it doesn’t search for that phrase as is: it identifies four areas—regulation, investment, key players, tech trends—that it handles separately before recomposing them.

Next comes exploration. Deep Research doesn’t settle for the first two results: it consults press articles, analyst reports, academic publications, public databases, and institutional sites, evaluating the relevance and reliability of what it reads at each step. A source contradicted by three others won’t carry the same weight in the final synthesis.

The last step is formatting. Collected information is organized into thematic sections, key points are highlighted, and sources are attached to the claims they support. You get a constructed document, not a raw aggregate of quotes.

Two Tools, Two Uses

Vibe also offers standard web search, and confusing the two is the first mistake users make when discovering the feature.

For “What is the capital of Lithuania?”, launching deep research would be absurd: you’d wait several minutes for a structured report where three seconds would suffice. The habit to build is asking yourself whether your question calls for a fact or an analysis.

Where Deep Research Makes the Difference

Market analysis is the most obvious use case: understanding a sector, its players, and its trends requires exactly this cross-referencing of heterogeneous sources. Tech watch works on the same principle, when you want to track the evolution of a technology or standard without sifting through announcements from six vendors yourself.

Deep Research also helps prepare a decision. Before a strategic choice, ask it to gather favorable and unfavorable arguments: you get a dossier presenting both sides, which no single-pass search produces. The academic world benefits similarly to summarize the state of research on a topic, and investigative journalism to cross-check information from independent sources.

Where Deep Research Stops

Processing time is the most visible constraint: expect between two and ten minutes depending on topic complexity. Launch the search, move on to something else, come back.

More critical is the access limit: Deep Research consults only what is publicly accessible on the web. Paid databases, intranets, and protected documents remain closed to it. If your sector relies on analyst reports sold for several thousand euros, the report will necessarily be partial on that point. Freshness poses a similar difficulty: exploration happens in real time, but information published the day before may not yet be indexed.

Finally, sources are cited so you can verify them, not to dispense you from doing so. Open those that carry a figure you plan to reuse. Deep Research saves you hours of reading; it does not replace your critical thinking, and delegating that to it would be the only real misunderstanding of this tool.

Key Takeaways

• Deep Research performs autonomous multi-source search and produces structured reports
• It differs from classic web search by its depth, iteration, and source citation
• Expect several minutes to get a complete report
• Prefer Deep Research for complex questions requiring cross-analysis
• Always verify cited sources before using information in a professional context