> 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.

# Legacy Lightning STT/TTS API reference orphans removed from docs

> Several legacy API reference MDX files that had already been unlinked from the v4 API reference navigation have been removed from the docs.

Several legacy API reference MDX files that had already been unlinked from the v4 API reference navigation have been removed from the docs.

**STT (Speech-to-Text):**

* The legacy `Lightning (Pre-Recorded)` HTTP reference (`POST /waves/v1/lightning/get_text`) and its OpenAPI spec (`fern/apis/waves/openapi/asr-openapi.yaml`). The current STT pre-recorded surface is **Pulse** (`POST /waves/v1/pulse/get_text`) - see [Pulse pre-recorded reference](/api-reference/models/speech-to-text/transcribe). The legacy MDX page was a verbatim copy of the Pulse one with the URL substituted, so no functionality is lost.
* (PR #110 separately removes the matching `Lightning ASR WebSocket` reference and its AsyncAPI spec.)

**TTS (Text-to-Speech):**

* The legacy `lightning-large` HTTP TTS, SSE, and WebSocket reference pages (`lightning-large.mdx`, `lightning-large-stream.mdx`, `lightning-large-ws.mdx`). These were already unlinked from v4 nav. The current TTS surface is `lightning-v3.1` - the migration prose under [Voice Cloning: Instant Clone API](/models/voice-cloning/instant-clone-api) already documents the cutover.

**Voice cloning impact:** none. The current voice-cloning flow (`POST /waves/v1/voice-cloning`) is unchanged. The deprecated `lightning-large` endpoints that *are* still in use (`add_voice`, `get_cloned_voices`, `DELETE /waves/v1/lightning-large`) remain in the API reference under **Voice Cloning** with their existing `(Deprecated)` labels.

If your code calls `https://api.smallest.ai/waves/v1/lightning/get_text` for STT or `https://api.smallest.ai/waves/v1/lightning-large/get_speech` for TTS, switch to Pulse and Lightning v3.1 respectively.

→ [Pulse pre-recorded reference](/api-reference/models/speech-to-text/transcribe)
→ [TTS API reference](/api-reference/models/text-to-speech/synthesize-speech)

> Several legacy API reference MDX files that had already been unlinked from the v4 API reference navigation have been removed from the docs.