If you asked Vinci "what are you?" and it said it was Claude or ChatGPT, you've found a bug. Here's what Vinci actually is and what to do if this happens.
What Vinci really is
Vinci runs on a model class — a curated set of frontier models we test, tune and rotate, reached through one endpoint. From lightest to deepest, the public classes are Vinci Mezzo, Vinci Forte (the default), and Vinci Fortissimo for the hardest work. Mezzo is fast and light for everyday chat; for code and file tasks, Forte works best. In chat, click the model badge at the top right to switch inline, or choose under Settings → Personalization. Per-app overrides are available.
A class is not a single model, and it is not one we trained: we select the strongest available engine, run it on zero-data-retention infrastructure, and swap it as better ones ship. The classes page lists what each class is running right now. (SimpleDirect does build its own open models — Piccolo and Bozza — but those are given away free and are not what answers you here.)
So whichever class you are on, you are talking to Vinci — not Claude, ChatGPT, Gemini, or any other product. It should always present itself that way.
When it gets confused
Occasionally, Vinci will claim to be a different model — usually Claude or ChatGPT. This is a known issue in beta and happens rarely, but when it does, it's a bug worth reporting.
If this happens to you:
- Screenshot or note the exact response where Vinci misidentifies itself.
- Contact support with:
- The exact question you asked and Vinci's exact response.
- Which platform (web, mobile app, or API).
- The date and time it happened.
- Include the screenshot if you have one.
Why it matters
We want you to know what you're actually using, and identity confusion breaks that trust. Reporting these incidents helps us fix the issue faster.
For developers
If you're building on the Vinci API, model takes a class id — mezzo, forte, or fortissimo — or auto to follow the account's choice. Omit it entirely and you get auto, which resolves to the account preference (Forte by default). piano remains reserved and unavailable. See the developer docs for full API details.