Universal-3.5 Pro
Universal-3.5 Pro (assemblyai/universal-3-5-pro) is a speech-to-text model from AssemblyAI on the OceanToken API at $0.005 per minute of audio.
- Output
- transcription
- Input
- audio
- Price
- $0.005 / minute of audio
LearnWhat Universal-3.5 Pro is and what it can do
What is Universal-3.5 Pro?
Universal-3.5 Pro is AssemblyAI's speech-to-text model served through its Sync API, returning a complete transcript with word-level timestamps in a single synchronous response for audio up to 20 minutes.
- Audio / minute of audio
- $0.005
- Input
- audio
Starting price
Output: transcription
What Universal-3.5 Pro can do
Speech-to-text
Meeting and call transcripts
CompareHow its price and specs stack up
Universal-3.5 Pro vs similar models: price
The starting price of each model on OceanToken, from the catalog as of November 5, 2026, in the unit each one is billed in. Each name links to that model's page.
Universal-3.5 Pro vs Nova-3
- Price
- Nova-3 costs $0.0043: 14% less than Universal-3.5 Pro.
Universal-3.5 Pro vs Transcribe 1 Pro
- Price
- Transcribe 1 Pro costs $0.006: 1.2× the price of Universal-3.5 Pro.
Universal-3.5 Pro vs Transcribe 1
- Price
- Transcribe 1 costs $0.006: 1.2× the price of Universal-3.5 Pro.
Universal-3.5 Pro vs MAI-Transcribe 1.5
- Price
- MAI-Transcribe 1.5 costs $0.006: 1.2× the price of Universal-3.5 Pro.
Universal-3.5 Pro specs
The technical card for Universal-3.5 Pro, from the OceanToken catalog.
- Input
- audio
- Output
- transcription
Universal-3.5 Pro model ID and endpoint
- OceanToken model ID
assemblyai/universal-3-5-pro- Base URL
https://api.oceantoken.ai/v1- Endpoint
POST /v1/audio/transcriptions
Buy and buildWhat it costs and how to send your first request
Universal-3.5 Pro API pricing
Prices come from the OceanToken catalog as of November 5, 2026. You pay per use from a prepaid balance, with no subscription.
- Audio
- $0.005 / minute of audio
OceanToken starting price as of November 5, 2026. The console always shows the current price. How tiers work
Add credits Specs, request sample and alternatives in the docsHow to use Universal-3.5 Pro on OceanToken
Three steps from no account to a working request. The same key and balance work for every model in the catalog.
Create an account and get an API key
Create an OceanToken account, then create a key. One key works for every model your account can use.
Add credits
OceanToken is prepaid: add credits, and each request is billed from that balance. Your console shows the rate for your tier.
Call Universal-3.5 Pro from your code
Send a request to
/v1/audio/transcriptionswith the model IDassemblyai/universal-3-5-pro. The docs show the whole request and how to read the result.Get API Key from openai import OpenAI # Your API Key from the OceanToken console client = OpenAI(base_url="https://api.oceantoken.ai/v1", api_key="YOUR_API_KEY") with open("meeting.mp3", "rb") as audio: result = client.audio.transcriptions.create( model="assemblyai/universal-3-5-pro", file=audio) print(result.text)# Your API Key from the OceanToken console curl https://api.oceantoken.ai/v1/audio/transcriptions \ -H "Authorization: Bearer YOUR_API_KEY" \ -F model="assemblyai/universal-3-5-pro" \ -F file="@meeting.mp3"
Universal-3.5 Pro API: frequently asked questions
Universal-3.5 Pro is AssemblyAI's speech-to-text model served through its Sync API, returning a complete transcript with word-level timestamps in a single synchronous response for audio up to 20 minutes.
Universal-3.5 Pro costs $0.005 per minute of audio. This is the OceanToken starting price as of November 5, 2026, charged per use to your prepaid balance. The console always shows the current price.
Universal-3.5 Pro takes audio as input and produces a transcript.
Send requests to https://api.oceantoken.ai/v1/audio/transcriptions with the model ID assemblyai/universal-3-5-pro and your OceanToken API key. The API is OpenAI-compatible, so an OpenAI SDK needs only the base URL https://api.oceantoken.ai/v1 and your key. The same OceanToken API key works for every model your account can use. Full reference: docs.oceantoken.ai.
OceanToken is prepaid. Open Credits in the console, choose an amount and pay by card on Stripe's hosted checkout page (Link works too). Your balance updates a few seconds after payment. Have a trial code? Redeem it on the same page.
Purchased credits are valid for 12 months from the date of purchase. Credits from trial codes, promotions or gifts may have a shorter validity. All purchases are final and non-refundable, except where the law requires a refund. Section 6 of the Terms of Service has the details.
Not if the request never ran: a request refused for an insufficient balance or by a safety check, or one whose provider fails before returning any output, is not charged. A video job that fails releases the amount it held. If a request breaks off after the model has started producing output, for example a stream cut off part-way, you pay for the tokens that were processed and generated for it.
Sources
- OceanToken model catalog: every price, context window, input, output and parameter on this page (November 5, 2026).
By the OceanToken team, from the catalog and the sources above.
Whatever you want.