# stt \[legacy]

{% hint style="warning" %}
This is the old version of our STT API, which has been known to experience failures due to timeouts. To avoid such issues, we recommend using the new endpoints described on other pages in the Speech-to-Text category.

The migration won’t take much time since the input parameters of the main endpoint remain the same, and each model includes detailed code examples.
{% endhint %}

{% hint style="success" %}
This service uses per-second billing. The cost of audio transcription is based on the number of seconds in the input audio file, not the processing time.
{% endhint %}


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.aimlapi.com/api-references/speech-models/speech-to-text/stt-legacy.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.