How Vex usage is metered
Vex AI uses Yaplet credits for every AI-generated reply in the chat widget. A credit is a unit of AI compute — roughly proportional to the length of the conversation context and the length of Vex's reply. Short replies on narrow topics cost fewer credits than long, multi-turn conversations on complex topics.
AI assist actions in the inbox (draft, summarize, rephrase) also draw from the same credit balance.
What does not use credits
- Chatbot workflow conversations — workflows are deterministic and don't call the LLM.
- Reading or searching your knowledge base — the knowledge source itself doesn't cost credits, only the AI reply generation does.
- Viewing reports, managing sources, or editing settings.
Voice vs. chat credits
Voice calls (AI phone) are billed separately at a per-minute rate, not per-reply. The credit balance is shared, but the billing rate differs. See the AI phone section for voice billing details.
Where to check usage
- Go to Automation → AI and open your Vex chatbot.
- The AI Conversation Reports tab shows conversation counts and AI response breakdowns for a date range you choose.
- For credit balance and purchase history, go to Settings → Billing and look for the Yaplet Credits section.
Topping up credits
When your credit balance runs low, Vex stops auto-replying and conversations fall back to live human agents — no data is lost, visitors just don't get an AI reply. You can top up credits any time from the billing page. Auto top-up is also available so credits refill automatically at a threshold you set.
Full details on buying credits and setting up auto top-up: Buy Yaplet credits for AI and voice usage.
Next step
Now that you understand usage, consider setting up the voice surface: Vex on voice — same brain, voice surface.