> 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.

# Pulse STT - `numerals` query parameter removed from the WS API reference

> The legacy numerals query parameter on the Pulse STT WebSocket has been removed from the API reference, navigation, and feature pages.

The legacy `numerals` query parameter on the Pulse STT WebSocket has been removed from the API reference, navigation, and feature pages. The 2026-05-06 deprecation note on this changelog feed flagged this for two weeks; today's clean-up drops it from the documented surface area.

**What changed in the docs**

* `numerals` removed from the Pulse WS AsyncAPI spec + v4 override.
* The "Numeric formatting" feature page and its nav entry are gone.
* The "Convert numerals" cards on `realtime/features.mdx` and `pre-recorded/features.mdx` are gone.
* The ITN feature page no longer lists `numerals` in its precedence table.

**What changed on the server**

Nothing in this release. The `numerals` query parameter still works as before - historic callers passing `numerals=true` will continue to get the same behavior. This is purely a docs cleanup; future deprecation/removal at the server layer will get its own changelog entry when it happens.

**What to use instead**

For new integrations, pass `itn_normalize=true` on the WebSocket connection. ITN covers digits as well as dates, currencies, phone numbers, and other spoken-form entities, and gives more consistent results across languages. See the [Inverse Text Normalization page](/models/speech-to-text/features/inverse-text-normalization) for details.