---
title: "Changes to Start AI Assistant"
method: POST
path: "/calls/{call_control_id}/actions/ai_assistant_start"
---

# Changes to Start AI Assistant

`POST /calls/{call_control_id}/actions/ai_assistant_start`

> Every recorded change to this operation, newest first.
> 152 revisions in range; 1 not diffed.

## Timeline

Changed in 16 of 152 revisions.

- **2026-10-21** `279d149de88f`: 2 info
- **2026-10-21** `bf888fe6e3fb`: 2 warning
- **2026-10-21** `6c91adf9fc1d`: 2 info
- **2026-10-01** `3957c3463375`: 1 info
- **2026-09-25** `88a6ea092777`: 1 info
- **2026-09-21** `1581f4d44566`: 1 info
- **2026-09-17** `4596ec306e59`: 1 info
- **2026-09-16** `a6a61a29ecdd`: 2 info
- **2026-08-17** `1571b0380bd7`: 3 breaking
- **2026-08-04** `8f5f4e537994`: 4 breaking
- **2026-07-30** `919265dc7d98`: 2 warning, 1 info
- **2026-07-30** `924fbdb1e5a1`: 1 info
- **2026-07-22** `ce9e90fc16f3`: 1 info
- **2026-07-13** `afc3349ad4f1`: 1 breaking, 1 info
- **2026-07-03** `80dbfc37f51e`: 1 info
- **2026-07-02** `224ed0d8a5c3`: 1 breaking

## Changes

- **2026-10-21** `279d149de88f`: 2 info
  - added the new `speechmatics/linden-1` enum value to the request property `assistant/transcription/model`
  - added the new `speechmatics/linden-1` enum value to the request property `transcription/model`
- **2026-10-21** `bf888fe6e3fb`: 2 warning
  - removed the request property `voice`
  - removed the request property `voice_settings`
- **2026-10-21** `6c91adf9fc1d`: 2 info
  - added the new optional request property `voice`
  - added the new optional request property `voice_settings`
- **2026-10-01** `3957c3463375`: 1 info
  - added the new optional request property `assistant/transcription`
- **2026-09-25** `88a6ea092777`: 1 info
  - added the new optional request property `assistant/tools/items/oneOf[subschema #3: WebhookTool]/timeout_ms`
- **2026-09-21** `1581f4d44566`: 1 info
  - added the new `omi-health/omi-med-stt-v1` enum value to the request property `transcription/model`
- **2026-09-17** `4596ec306e59`: 1 info
  - added the new `assemblyai/universal-3-5-pro` enum value to the request property `transcription/model`
- **2026-09-16** `a6a61a29ecdd`: 2 info
  - the `language` request property default value `auto` was removed
  - added the new `cohere/ar-stt` enum value to the request property `transcription/model`
- **2026-08-17** `1571b0380bd7`: 3 breaking
  - the response's body type changed from `object` to no type for status `default`
  - the `errors/items/` response's property type changed from `object` to no type for status `default`
  - the `errors/items/code` response's property type changed from `integer` to `string`, and format from `int32` to `integer` for status `default`
- **2026-08-04** `8f5f4e537994`: 4 breaking
  - the response's body type changed from no type to `object` for status `default`
  - the `errors/items/` response's property type changed from no type to `object` for status `default`
  - the `errors/items/code` response's property type changed from `string` to `integer`, and format from `integer` to `int32` for status `default`
  - the `errors/items/source/pointer` response's property format changed from `json-pointer` to no format for status `default`
- **2026-07-30** `919265dc7d98`: 2 warning, 1 info
  - removed the request property `voice`
  - removed the request property `voice_settings`
  - added the new optional request property `assistant/voice_settings`
- **2026-07-30** `924fbdb1e5a1`: 1 info
  - added the new `reson8/turns` enum value to the request property `transcription/model`
- **2026-07-22** `ce9e90fc16f3`: 1 info
  - added the new `humain/realtime` enum value to the request property `transcription/model`
- **2026-07-13** `afc3349ad4f1`: 1 breaking, 1 info
  - removed the enum value `parakeet/tdt-0.6b-v3` of the request property `transcription/model`
  - added the new `nvidia/parakeet-v3` enum value to the request property `transcription/model`
- **2026-07-03** `80dbfc37f51e`: 1 info
  - added the new `parakeet/tdt-0.6b-v3` enum value to the request property `transcription/model`
- **2026-07-02** `224ed0d8a5c3`: 1 breaking
  - removed the enum value `nvidia/parakeet-v3` of the request property `transcription/model`

---

[Operation](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/docs/calls/:call_control_id/actions/ai_assistant_start/post.md) - [API](https://skmtc.dev/team-telnyx/apis/telnyx-api-2.md) - [Page](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/changes/calls/:call_control_id/actions/ai_assistant_start/post)