# AssemblyAI U3 RT Pro

AssemblyAI U3 RT Pro transcribes live audio for $0.0075 per minute on LLM API.

Model ID: `u3-rt-pro` · AssemblyAI · Streaming speech to text · Released March 3, 2026
Updated: 2026-10-13
Canonical: https://llmapi.ai/models/u3-rt-pro/

- Per minute: $0.0075
- Task: Live transcription

## Pricing

Served by AssemblyAI, the only provider.

| Price | Amount | Per |
| --- | --- | --- |
| Live transcription | $0.0075 | per minute |

**Volume pricing.** At higher monthly volume, AssemblyAI U3 RT Pro 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).

## Call AssemblyAI U3 RT Pro

Streaming speech to text models are not called through an OpenAI-style endpoint. [Read the docs](https://docs.llmapi.ai/features/audio-streaming)

## Compliance, already done

LLM API is SOC 2 compliant, ISO 27001 certified, and compliant with GDPR and CCPA.

SOC 2 compliant, ISO 27001 certified, GDPR compliant, CCPA compliant: [Security and compliance](https://llmapi.ai/dpa/).

## More from AssemblyAI

- [AssemblyAI Universal-3.5 Pro](https://llmapi.ai/models/universal-3-5-pro/): $0.0035 per minute
- [AssemblyAI Universal Streaming (Multilingual)](https://llmapi.ai/models/universal-streaming-multilingual/): $0.0025 per minute
- [AssemblyAI Universal-2](https://llmapi.ai/models/universal-2/): $0.0025 per minute

Prices synced 2026-11-09.

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