---
title: "Changes to Text to speech"
method: POST
path: "/v1/text_to_speech"
---

# Changes to Text to speech

`POST /v1/text_to_speech`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 9 of 54 revisions.

- **2026-08-07** `cbbe796a13a0` — 1 breaking
- **2026-08-07** `73a12c23285c` — 4 info
- **2026-07-06** `8b1c682294d7` — 1 info
- **2025-12-04** `6dab1bdab5d3` — 3 info
- **2025-12-03** `c2a88516fa0c` — 2 info
- **2025-12-03** `76b3962cf49e` — 2 info
- **2025-11-04** `6902fa9494c5` — 1 breaking, 2 info
- **2025-10-22** `8448e1c9a862` — 1 breaking, 1 info
- **2025-10-22** `90724848e40f` — 1 breaking, 3 warning, 4 info

## Changes

- **2026-08-07** `cbbe796a13a0` — 1 breaking
  - removed `subschema #1: SeedPresetVoice` from the `oneOf[subschema #1: seed_audio]/voice` request property `oneOf` list
- **2026-08-07** `73a12c23285c` — 4 info
  - added `subschema #3: eleven_v3` to the request body `oneOf` list
  - added `subschema #1: SeedPresetVoice` to the `oneOf[subschema #1: seed_audio]/voice` request property `oneOf` list
  - added the non-success response with the status `400`
  - added the required property `estimatedCost` to the response with the `200` status
- **2026-07-06** `8b1c682294d7` — 1 info
  - added `subschema #1: seed_audio` to the request body `oneOf` list
- **2025-12-04** `6dab1bdab5d3` — 3 info
  - the `model` request property default value `eleven_multilingual_v2` was removed
  - the `type` request property default value `runway-preset` was removed
  - added the media type `application/json` for the response with the status `429`
- **2025-12-03** `c2a88516fa0c` — 2 info
  - the `model` request property default value `eleven_multilingual_v2` was added
  - the `type` request property default value `runway-preset` was added
- **2025-12-03** `76b3962cf49e` — 2 info
  - the `model` request property default value `eleven_multilingual_v2` was removed
  - the `type` request property default value `runway-preset` was removed
- **2025-11-04** `6902fa9494c5` — 1 breaking, 2 info
  - removed `subschema #1` from the `oneOf[subschema #1: eleven_multilingual_v2]/voice` request property `oneOf` list
  - the `model` request property default value `eleven_multilingual_v2` was added
  - added `subschema #1: RunwayPresetVoice` to the `oneOf[subschema #1: eleven_multilingual_v2]/voice` request property `oneOf` list
- **2025-10-22** `8448e1c9a862` — 1 breaking, 1 info
  - removed `subschema #1: RunwayPresetVoice` from the `oneOf[subschema #1: eleven_multilingual_v2]/voice` request property `oneOf` list
  - added `subschema #1` to the `oneOf[subschema #1: eleven_multilingual_v2]/voice` request property `oneOf` list
- **2025-10-22** `90724848e40f` — 1 breaking, 3 warning, 4 info
  - the request's body type/format changed from `object`/`` to ``/``
  - removed the request property `model`
  - removed the request property `promptText`
  - removed the request property `voice`
  - added request discriminator
  - added `subschema #1: eleven_multilingual_v2` to the request body `oneOf` list
  - added the non-success response with the status `429`
  - the `id` response's property pattern `^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12})$` was added for the status `200`

---

[Operation](https://skmtc.dev/runwayml/apis/runwayml-api/docs/v1/text_to_speech/post.md) · [API](https://skmtc.dev/runwayml/apis/runwayml-api.md) · [Page](https://skmtc.dev/runwayml/apis/runwayml-api/changes/v1/text_to_speech/post)