Billing model#
LumenFlow uses a hybrid billing model:
- Platform fee — fixed monthly charge based on your plan
- Managed inference usage — included credit on Free, metered on paid plans
- BYOK provider usage — billed by your chosen model provider when applicable
You pay LumenFlow for the platform and any managed inference you use. If you connect a bring your own model key, that provider bills the model usage directly.
How metering works#
Every interaction with Sidekick consumes tokens:
| Component | Tokens |
|---|---|
| System prompt | ~500 (fixed overhead) |
| Your message | Varies by length |
| Conversation history | Grows with conversation |
| Tool definitions | ~200 per connected tool |
| Response | Varies by complexity |
Token usage is tracked per action and displayed in Observe → Analytics.
Payment methods#
- Credit card — Visa, Mastercard, Amex
- Annual billing — on our roadmap; contact us for details
- Invoice — Available for Enterprise arrangements
Billing cycle#
- Platform fees are charged on the 1st of each month
- Token usage is metered in real-time
- Invoices are available in Settings → Billing → Invoices
info Free plan users don't need a payment method. You'll be prompted to add one when upgrading or exceeding the included managed inference allowance.