Below your key, on the same tab, there's an independent switch: **"Automatic platform fallback"** — on by default. It doesn't depend on whether you have an own key configured or not; you can adjust it at any time. ## When it actually kicks in If your own key fails in a **confirmed** way (never because of a passing network glitch or a one-off timeout) and your plan still has quota available, the platform answers that turn with **its own key** so your assistant isn't left without a reply. - That turn is billed as **normal usage of your plan** — not your provider's — and shows up in the "Fallback" row of the breakdown by source (section 5), never mixed in with "Your own key". - You'll get a **notice** (bell and, depending on your preferences, email) the **first time it happens each day** — not one per turn, so you aren't flooded with notifications if the problem persists all day. - If you **turn off** fallback, or if your plan **has no quota available** at that moment, that turn fails with an honest message instead of generating a cost you wouldn't see reflected on your own provider's bill. ## Procedure: turning fallback on or off 1. In **Settings → Bring your own AI provider**, find the "Automatic platform fallback" section, below your key. 2. Click the switch. **Result:** the change is saved instantly — there's no separate "Save" button for this setting.