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Deep research

Turn a broad question into a cited decision brief

Ask Gemini to act as a skeptical analyst that separates verified facts, inferences, and unknowns, keeps dates beside time-sensitive claims, and ends with a decision table you can act on.

Le prompt

Act as a skeptical research analyst. Investigate [TOPIC] for [AUDIENCE]. Separate verified facts, reasonable inferences, and unknowns. Use primary sources where possible, include dates beside time-sensitive claims, and finish with a decision table covering evidence, trade-offs, confidence, and next action. If a claim cannot be sourced, say so rather than guessing.

Remplacez les variables

[TOPIC]

The question or decision, stated as narrowly as you can.

[AUDIENCE]

Who reads the result — changes depth and tone.

Quel modèle utiliser

  • Gemini 3.1 ProLonger, source-grounded reasoning benefits from the Pro tier; Flash is fine for quick scans.

Exemple d'entrée

  • [TOPIC] = "Should a 5-person startup self-host analytics or use a SaaS in 2026?" [AUDIENCE] = "a non-technical founder".

Exemple de sortie

Nous ne publions que des exemples de sorties issus d'exécutions réelles sur un modèle. Ce modèle n'a pas encore été formellement testé, aucune sortie n'est donc affichée. Exécutez-le vous-même avec l'entrée ci-dessus.

Pourquoi cette structure fonctionne

  • Forcing a facts / inferences / unknowns split stops the model from smoothing over uncertainty.
  • Requiring dates beside time-sensitive claims surfaces stale information.
  • A decision table converts prose into something you can actually choose from.

Échecs courants et correctifs

The model invents sources or citations.

Correctif : Add: "List only sources you can name; mark anything unsourced as UNVERIFIED." Then spot-check the named sources.

Answer is generic.

Correctif : Narrow [TOPIC] and add constraints (budget, region, timeframe).

Limites connues

  • Model outputs can still contain confident errors — verify sources before acting.
  • Freshness depends on the model and whether web/grounding tools are enabled.

FAQ

Does this guarantee accurate citations?

No. It reduces vague hand-waving, but you must still open and verify each named source. Treat unsourced claims as unverified.

Non affiliée à Google ni soutenue par lui. Gemini, Nano Banana et Veo sont des marques de Google LLC.