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(not OP) Have seen an article in a french magazine called "60 millions de consommateurs" it is a well known magazine from "national institute of consumers" and they provide neutral information for consumers and very often tackle corporate. They also help people with specific problems by using there legal departments and others technical departments.

extract from article: (auto translated so could have some errors, feel free to ask if necessary)

"How we did it

• Ten letters from readers sent in 2025 to the editorial staff of "60" were selected. Messages asking questions, sometimes thorny, on the main consumer topics: banking, housing, health, guarantees, and even transportation.

• These questions were submitted in August to three free artificial intelligences: ChatGPT-5 (OpenAI), Gemini 2.5 Flash (Google), and Le Chat (Mistral AI).

• Each response was dissected by the legal or technical department of the National Consumer Institute. Is the advice given accurate, incomplete, or far-fetched? The most convincing AI was distinguished, unless all failed to answer correctly."

One example of the letters: (same as above, auto translated, added some context for ease of understanding)

" A questionable rent increase

<< We have been renting since August 2013 and we have just received a registered letter announcing a rent increase. However, we have no information about the revaluation index in this letter, nor in the lease. Furthermore, I have just discovered that a landlord does not have the right to increase the rent without having provided an energy performance diagnosis (DPE). What can I do?>>>

AI responses: our analysis

ChatGPT and Le Chat point out that the Climate and Resilience Act of August 22, 2021, prohibits rent increases for F or G housing [these letters indicate energy performance diagnosis], which is an energy sieve. Le Chat rightly advises asking the landlord for the DPE and contesting the increase if it displays F or G. If the dispute persists, he recommends consulting a lawyer or a tenant defense association. He could also have cited the justice conciliator!

Chat gpt and Gemini are more vague or even incomprehensible. Gemini states that the "landlord has the right to increase the rent even without an DPE, unless the energy class of the housing is F or G." An energy class given without an DPE, really?

Winner= Le chat"

"Verdict

With three correct answers each, ChatGPT and Le Chat have a narrow lead over Gemini. This doesn't stop them from making mistakes, or even inventing convenient legal passages to support their arguments. Surprisingly, the upgrade from version 40 mini to version 5 in early August caused ChatGPT to lose its advantage in two cases! Disappointing for an AI supposed to behave like "a PhD-level expert," according to Sam Altman, head of OpenAI, its publisher. As it stands, it's difficult to recommend one AI over another. To increase the quality of the answer obtained, cross-reference it with those provided by other AIs. The safest course of action is to make an appointment with a real lawyer. To obtain a free consultation with a professional, contact a consumer association or one of the approximately 3,000 legal access points spread throughout the country"

Deepseek is great, but it is a Chinese AI LLM. I am also of Indian-origin so I try to avoid Chinese products as much as possible. China also has friendship ties with Russia and Pakistan so there is that.