AI USE CASES YOU CAN REUSE.English edition · Individuals, independents, small businesses
Practical case

Compare its electricity or gas offers on the official comparator

Prepare the information of his bill (excluding identity), then compare on the comparison of the national energy mediator, rather than rely on a commercial comparator or a figure invented by an AI.

The result to aim for

1. The info to enter on comparator.energy-info.fr, in order, and where to read them on my bill (labelled, not my invented numbers).

The situation

energy-info.fr is the information site of the National Energy Ombudsman, independent of suppliers. The public comparator (comparator.energy-info.fr) estimates an annual invoice from the municipality, consumption and tariff option. The fact sheet "How to compare electricity and natural gas offers" reminds us not only to compare the price (evolution, service, fees, payment methods). Changing supplier is self-made; the quality of the network does not change.

Before you start

Tool cited: ChatGPT; the prompt also works with Claude. Gather the information the prompt asks for. Strip confidential data that is not needed and check your tool’s access terms. Features and plans can change.

The method, in three steps.

  1. Gather the context

    Gather the information described in the prompt.

  2. Adapt the prompt

    Copy the prompt below, replace the bracketed items, then paste it into ChatGPT, Le Chat or Claude.

  3. Reread before using

    Reread the result, correct it if needed and keep the final decision. Caveats are detailed below.

Your starting point.

Replace the bracketed items, then adapt the proposal to your situation. This prompt is written by the iadujour desk.

The prompt to customise
You act as a comparison guide to energy offers. You're not a broker. You don't agree. You don't calculate any amount owing.

Context (without PDL, PRM, IBAN, name, full address):
- Energy:
- Commune or postal code:
- Annual consumption if I have it:
- Option:
- Current offer:
- What matters to me:

Deliverable:
1. The info to enter on comparator.energy-info.fr, in order, and where to read them on my bill (labelled, not my invented numbers).
2. The criteria to compare in addition to the price (evolution, service, fee, contact), according to the energy-info sheet, without the number of offers.
3. 6 questions to ask me before changing (duration, indexation, ancillary services, green).
4. How to change yourself, and what does not change (network, troubleshooting).

Rules:
- No price, no kWh, no supplier ranking.
- Returns to comparator.energy-info.fr, not to a commercial comparator.
- If a conso lacks, say how to estimate on energy-info.fr, do not invent.
- I compare and sign myself.

What deserves your attention

Do not paste PDL, PRM, IBAN, or full address. Postal code and consumption in kWh are sufficient. Do not subscribe from the tool. Cut each offer over the official comparator before signing.
Origin of the case. Scenario designed by the iadujour.fr desk, written in November 2026.
Proof level: Practical case written by the desk, no third-party source. This is not a testimony: adapt the prompt to your situation.
TO GO FURTHER

Other ideas to put to work.

The whole Money theme
Money

Compare shopping options before placing an order

An user had his agent compare the five models he had spotted on a merchant site, in a table; Instead of two hours of search, the order was placed in ten minutes.

Tool: Hermes AgentType: Spotted
DISCUSSION

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