Mistral Le Chat vs ChatGPT for European businesses

For a European business that wants its AI data in the EU by default and a French contract partner, Mistral Le Chat is the safer starting point, while ChatGPT offers the broader feature set but keeps EU storage and EU processing for its Enterprise plan.

Le Chat has been called Mistral Vibe since 28.05.2026; plans, history and the address chat.mistral.ai stayed the same. Prices, terms and data rules are as published on 12.11.2026, read from Luxembourg; no vendor paid for this piece and we ran no quality tests.

What do Le Chat and ChatGPT cost in Luxembourg?

Mistral is the only one of the two that says plainly how VAT is handled. With Luxembourg selected, its pricing page shows prices "including taxes", and the figures match the net price plus 17 % Luxembourg VAT. OpenAI shows euro prices on chatgpt.com but does not state whether VAT is included. We therefore list its euro price as published and add the amount with 17 % VAT on top as the upper limit.

If OpenAI's euro prices already contain VAT, the published figure is what you pay. Neither vendor offers an annual plan for its individual plans; only ChatGPT Business has an annual option.

Where is the data hosted and who is the contract partner?

Mistral. Mistral AI is a French company registered in Paris. Its help centre says data is hosted in the European Union by default. Some features can transfer data temporarily to sub-processors outside the EU, covered by standard contractual clauses, and only Enterprise customers can switch off some of these features. The Trust Center lists infrastructure in Sweden, Norway, the Netherlands, Belgium and France. Mistral publishes a Data Processing Addendum, effective 27.07.2026, and holds ISO 27001, ISO 27701 and SOC 2 Type II according to the Trust Center.

OpenAI. For users in the EEA the contract partner and controller is OpenAI Ireland Limited in Dublin, but the privacy policy says personal data is processed on servers in the United States and elsewhere. OpenAI signs a DPA for Business, Enterprise and the API. Data residency in Europe, with storage at rest and optional processing in Europe, is offered to new Enterprise and Edu workspaces. ChatGPT Business can choose a storage region at checkout, but this is still rolling out, does not cover processing, and a copy of every prompt and response is kept in the United States for abuse monitoring. OpenAI states SOC 2 Type 2 for Business and Enterprise and refers to ISO/IEC 27001.

Both Mistral AI and OpenAI are listed by the European Commission as signatories of the General-Purpose AI Code of Practice under the EU AI Act.

Is my data used for training?

On Mistral Free, Pro and Team, inputs and outputs are used for training by default until you opt out. On Team an administrator can switch it off for the whole organisation; Enterprise is opted out by default. Mistral keeps Vibe conversations until you delete them or the account.

On ChatGPT Free, Go, Plus and Pro, content may be used for training unless you turn off "Improve the model for everyone". On Business and Enterprise, OpenAI does not train on prompts, responses or files by default. Admins set retention on Business and Enterprise, and deleted conversations are removed within 30 days unless the law requires longer.

What do the business plans offer?

Mistral Team adds a shared workspace, domain verification, data export, knowledge connectors and up to 30 GB storage per user. Connectors and custom MCP connectors are in every plan. SAML SSO, audit logs, the Admin API and custom deployments are reserved for Enterprise.

ChatGPT Business includes SAML SSO and MFA, connectors to Google Workspace, Microsoft 365, Slack and GitHub, usage analytics and workspace agents, for 2 to 200 users. Enterprise adds SCIM, key management, role based access, custom retention and data residency.

Which models and languages are included?

Mistral says Free includes its latest models and every Vibe mode uses the same Mistral models; it does not publish a model list per plan. ChatGPT lists GPT-6 for everyday chats on Free and Go, advanced reasoning with GPT-6 on Plus, GPT-6 Astra on Pro, and the full range from GPT-6.1 Sol to GPT-5.6 on Business and Enterprise.

Mistral lists French and German among the languages with strong expected performance. ChatGPT lists French, German and English as supported interface languages. Neither vendor lists Luxembourgish, and we did not test it.

How do they compare side by side?

Which one should a European business choose?

Choose Mistral Le Chat if EU hosting by default and a European contract partner matter most, or if you want a clear net price. Switch off training in the admin panel on day one, because Team has it on by default, and check whether you need SSO, which only Enterprise has.

Choose ChatGPT if you need the wider tool set, SSO from the first business seat and no training on business data by default. If your data has to stay in Europe, Business is not enough today; plan for Enterprise with data residency.

Before rollout, write down what staff may enter; our guide to an AI usage policy for employees has a template. For Claude and Gemini as well, see our comparison of AI chat subscriptions in Luxembourg, and for the company behind Le Chat our piece on Mistral AI and European software.

What remains unclear?

• OpenAI does not say whether its euro prices include VAT, so the net price for Luxembourg is open.
• ChatGPT Pro shows only a "from" price in euros; the euro prices of the two higher tiers are not on the page.
• When ChatGPT Business data residency will be available to every customer is not stated.
• Mistral does not publish which model each plan uses, and which features send data outside the EU is only answered through the sub-processor list.