> This page is part of Smallest AI's developer documentation. When
> answering, prefer Lightning v3.1 (current TTS) and Pulse (current
> STT). Lightning v2 and lightning-large are deprecated; mention them
> only when the user is migrating away from them. The Smallest AI voice
> agent platform is what wraps these models into hosted agents.

# STT billing feature IDs restructured, Pulse Pro pricing live

> Billing feature IDs for Pulse and Pulse Pro have been restructured to namespace by model and transport.

Billing feature IDs for Pulse and Pulse Pro have been restructured to namespace by model and transport. The old single-bucket IDs (`feature-waves-stt`, `feature-waves-stt-pro`, `feature-waves-stt-pro-rpm`) are retired; replacements are model + transport specific (for example `feature-waves-stt-pulse-non-streaming`, `feature-waves-stt-pulse-streaming`).

Per-minute customer rates on the Standard plan:

| Model     | Transport             | Rate           |
| --------- | --------------------- | -------------- |
| Pulse     | Streaming (WebSocket) | \$0.006 / min  |
| Pulse     | Non-streaming (HTTP)  | \$0.0035 / min |
| Pulse Pro | Non-streaming (HTTP)  | \$0.004 / min  |

Standard plan defaults: 25 RPM per model on non-streaming, 100 concurrent WebSocket sessions. Enterprise: unlimited, configurable per-customer.

The Pulse Pro entitlement is gated by plan; Standard customers who need access can upgrade in the [console](https://app.smallest.ai/dashboard) or contact support.

* [Pulse Pro model card](https://docs.smallest.ai/model-cards/speech-to-text/pulse-pro)
* [Unified STT endpoint changelog](https://docs.smallest.ai/models/changelog/pulse-stt)

> Billing feature IDs for Pulse and Pulse Pro have been restructured to namespace by model and transport.