Under **Billing → Breakdown by source** (Manual 34, section 4) you'll see your usage split into three sources: **Platform**, **Your own key** and **Fallback**. The "Your own key" row shows calls and tokens (as a purely informational figure, so you can see how much you use your own AI), but **never a euro amount** — instead, the text "Not billed to your plan". > **Note — Why: your provider pays that cost, not the platform** > > When you use your own key, it's **your provider** (OpenAI, Anthropic, Google or DeepSeek) who bills you directly, under their own billing, outside your commercial relationship with the platform — putting a euro amount here would mean inventing a cost the platform can't know or bill you for. Check your own provider's billing panel if you want to see the real cost of your usage. > **Warning — It also doesn't count toward your "AI Budget" or your plan's token quota** > > Usage with your own key stays **outside** the two indicators you already know from your plan (Manual 34, sections 4 and 5): it doesn't show up in "AI Budget" (€) and doesn't deduct anything from your monthly token quota. Those two indicators only add up what's served with the platform's key — including automatic fallback usage (section 6), which IS billed to the plan like any other turn. Your own key's tokens are shown only as a reference of how much you use your own provider, never as part of what you consume from your plan.