# AssemblyAI

AssemblyAI serves 6 audio models on LLM API, all from AssemblyAI.

6 models
Updated: 2026-10-13
Canonical: https://llmapi.ai/providers/assemblyai/

## Models and prices

Prices when AssemblyAI serves the request.

### Audio (6)

Price per minute of audio or per 1K characters.

| Model | Model ID | Task | Price |
| --- | --- | --- | --- |
| [AssemblyAI U3 RT Pro](https://llmapi.ai/models/u3-rt-pro/) | `u3-rt-pro` | Live transcription | $0.0075 / minute |
| [AssemblyAI Universal-3.5 Pro](https://llmapi.ai/models/universal-3-5-pro/) | `universal-3-5-pro` | Transcription | $0.0035 / minute |
| [AssemblyAI Universal Streaming (Multilingual)](https://llmapi.ai/models/universal-streaming-multilingual/) | `universal-streaming-multilingual` | Live transcription | $0.0025 / minute |
| [AssemblyAI Universal-2](https://llmapi.ai/models/universal-2/) | `universal-2` | Transcription | $0.0025 / minute |
| [AssemblyAI Universal Streaming (English)](https://llmapi.ai/models/universal-streaming-english/) | `universal-streaming-english` | Live transcription | $0.0025 / minute |
| [AssemblyAI Whisper RT](https://llmapi.ai/models/openai-whisper-rt/) | `whisper-rt` | Live transcription | $0.005 / minute |

**Volume pricing.** At higher monthly volume, models on AssemblyAI may cost less. Book a call and sales will quote a price for your usage. [Book a call with sales](https://meetings.hubspot.com/julia-andriienko/llmapi) or [Create an account first](https://app.llmapi.ai/signup).

## Send requests to AssemblyAI

Use the model ID as it is: video, audio and embedding requests take no provider prefix.

Example: AssemblyAI Universal-3.5 Pro, Transcription (`POST /v1/audio/transcriptions`). Set LLMAPI_KEY to your LLM API key.

```python
import os

from openai import OpenAI

client = OpenAI(
    base_url="https://api.llmapi.ai/v1",
    api_key=os.environ["LLMAPI_KEY"],
)

transcript = client.audio.transcriptions.create(
    model="universal-3-5-pro",
    file=open("meeting.mp3", "rb"),
)
print(transcript.text)
```

Prices synced 2026-10-27.

Next step: [Get API key](https://app.llmapi.ai/signup)