# Universal-3 (AssemblyAI) — API pricing and providers

> Transcription. Model id `assemblyai/universal-3`. Audio model by AssemblyAI.

- Page: https://infro.io/models/assemblyai/universal-3
- Vendor: AssemblyAI (https://infro.io/models/assemblyai)
- Modality: Audio
- Endpoint through INFRO: `POST /v1/audio/speech` at https://api.infro.io/v1
- List rate: $0.27 per audio hour
- Rates checked: 2026-10-05

Rates are AssemblyAI's published list price: what the customer's own provider account bills, not an INFRO charge. INFRO is a BYOK control plane; it charges a software subscription and adds 0% to model spend.

## Providers that serve it

None of the provider kinds INFRO connects serves it in production today.

## Questions

### How much does the Universal-3 API cost?

AssemblyAI's published list rate for Universal-3 is $0.27 per audio hour (checked 2026-10-05). The provider account you connect bills you at the rate on that account, so a negotiated rate replaces the list rate. INFRO adds 0% to model spend.

### Which providers serve Universal-3?

None of the provider kinds INFRO connects serves Universal-3 in production today.

### What is the Universal-3 model ID?

Request it from INFRO as "assemblyai/universal-3".

### How do I call Universal-3 through an OpenAI-compatible API?

Point an OpenAI SDK, or any HTTP client, at https://api.infro.io/v1 with an INFRO gateway key and send model "assemblyai/universal-3" to POST /v1/audio/speech. INFRO runs the request on a provider account you connected and returns the provider's response with an estimated cost.

### Does INFRO mark up Universal-3 usage?

No. AssemblyAI or the provider you connect bills model usage to your own account. INFRO charges a software subscription for routing, failover, observability, budgets and policy, and takes 0% of model spend.