---
title: "ElevenLabs API Default agent TTS model changed from eleven_flash_v2 to eleven_v4_turbo: 2026-10-05 | Harbyn"
description: "ElevenLabs API Default agent TTS model changed from eleven_flash_v2 to eleven_v4_turbo, announced Oct 5, 2026."
canonical: "https://harbyn.com/changes/elevenlabs/2026-10-05-api-3"
last-updated: 2026-10-06
---

# ElevenLabs API Default agent TTS model changed from eleven\_flash\_v2 to eleven\_v4\_turbo

Markdown version of <https://harbyn.com/changes/elevenlabs/2026-10-05-api-3>.

Behavior change - ElevenLabs API. medium severity. In effect.

The default conversational TTS model for agents changed from eleven\_flash\_v2 to eleven\_v4\_turbo. Agents that do not set a TTS model explicitly now use Eleven v4 Turbo.

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [ElevenLabs API](https://harbyn.com/vendors/elevenlabs.md) |
| Kind | Behavior change |
| Severity | medium |
| Status | In effect |
| Announced | Oct 5, 2026 |
| Added to Harbyn | Oct 6, 2026 |
| Lead time | No dated deadline |
| Review | Reviewed by a person, extracted by a model |

## Find it in your code

```sh
npx harbyn scan
```

This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses ElevenLabs API, from its packages and API hosts. Nothing leaves your machine.

## Sources

Where this event comes from: the page we read, when we read it, and the hash of that snapshot.

- <https://elevenlabs.io/docs/changelog.md> (changelog, fetched 2026-10-06 20:03 UTC, sha256 `5dd0421171aacd5d2f3316c7dd2e7921c6678ce21cb9bef7222cc63e34839d4d`)

## Related changes

### More from ElevenLabs API

- [Removed max\_depth from crawl job responses](https://harbyn.com/changes/elevenlabs/2026-10-05-api-4.md) (Breaking change, announced Oct 5, 2026)
- [Structured procedures compile automatically](https://harbyn.com/changes/elevenlabs/2026-10-05-elevenagents.md) (Behavior change, announced Oct 5, 2026)
- [Compile procedures endpoint marked legacy](https://harbyn.com/changes/elevenlabs/2026-10-05-elevenagents-2.md) (Deprecation, announced Oct 5, 2026)
- [ElevenLabs Swift SDK v3.4.0: Dynamic variables keep native JSON types](https://harbyn.com/changes/elevenlabs/2026-10-05-sdk-releases-2.md) (Behavior change, announced Oct 5, 2026)

### Changes at other vendors

- [Amazon Selling Partner API: ORDER\_CHANGE notifications add PreFulfillmentStatusChange for Amazon Autos](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-3.md) (effective Oct 28, 2026)
- [BigCommerce: 301 redirects will apply only to storefront channels](https://harbyn.com/changes/bigcommerce/2026-10-07-301-redirects-now-apply-to-storefront-channels-only.md) (effective Nov 10, 2026)
- [GitHub: Secret scanning audit log business field changes to enterprise slug](https://harbyn.com/changes/github/2026-10-20-updates-to-github-secret-scanning-7.md) (effective Nov 12, 2026)
- [Jira / Atlassian Cloud: New IP address ranges in use from January 1, 2027](https://harbyn.com/changes/atlassian-jira/2026-10-16-atlassian-cloud-adds-new-ip-address-ranges.md) (effective Jan 1, 2027)

[All upcoming deadlines](https://harbyn.com/deadlines.md)