> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ai-coustics.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Deprecated models

> Guide to migrating away from deprecated models.

<Note>
  Historical support boundaries for removed model IDs. Check the current model reference before starting a new integration. For a current upgrade, start with the [upgrade guide](/reference/sdk/upgrading) and [compatibility matrix](/reference/sdk/compatibility-matrix).
</Note>

This page covers recent model replacements and the last core SDK versions that support the removed IDs.

Last supported versions on this page refer to the **core SDK**, not the independently versioned language packages. Use the [compatibility matrix](/reference/sdk/compatibility-matrix) to match your package to its core SDK and model file version. The model IDs listed on this page are no longer supported by the current core SDK.

<div id="quail" />

## Quail Voice Focus

Quail Voice Focus 2.1 L and S were supported through core SDK 0.21.4. For current deployments, evaluate [Quail Voice Focus 2.2](/reference/sdk/models#quail-voice-focus) for primary-speaker isolation. Core SDK 0.22.0 was released in August 2026.

<AccordionGroup>
  <Accordion title="Quail Voice Focus 2.1 L (16 kHz)">
    * **ID:** `quail-vf-2.1-l-16khz`
    * **Last supported core SDK version:** 0.21.4
  </Accordion>

  <Accordion title="Quail Voice Focus 2.1 S (16 kHz)">
    * **ID:** `quail-vf-2.1-s-16khz`
    * **Last supported core SDK version:** 0.21.4
  </Accordion>
</AccordionGroup>

## Tyto

Core SDK 0.23.0, released in August 2026, replaced Tyto 1.0 with [Tyto 1.1](/reference/sdk/models#tyto), published as `tyto-1.1-l-16khz`. This is a model version replacement, not just a rename. Download the new model and update your integration for the [analysis result field changes](/changelog).

<AccordionGroup>
  <Accordion title="Tyto 1.0 L (16 kHz)">
    * **ID:** `tyto-l-16khz`
    * **Last supported core SDK version:** 0.22.0
  </Accordion>
</AccordionGroup>

## Next steps

* Check the [models overview](/reference/sdk/models).
* Download available models at [artifacts.ai-coustics.io](https://artifacts.ai-coustics.io).


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