AssemblyAI: Universal-3.5 Pro

assemblyai/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 clips up to 120 seconds....

Modalities

Audio → Transcription

Input / Output PriceSpecialized media pricingToken prices are not claimed for this media endpoint

ContextNot providedtokens · maximum across providers

ReleasedSep 22, 2026Public catalog metadata

Availability & data sources Listed in CLSSAI · 1 reference endpoints

CLSSAI API · Directory listedCatalog preview · Exact metadata

ACCESS

Where this model works

Catalog preview and CLSSAI API routing are independent decisions with separate sources.

Catalog previewTestable in Playground

Testable

Exact capability metadata is available. CLSSAI can prepare the Speech to text request without guessing the model contract.

Evidence: Exact ID assemblyai/universal-3-5-pro · /audio/transcriptions
Mapped mode: Speech to text

CLSSAI APICallable through CLSSAI API

Callable

The exact model ID is listed in the current CLSSAI public directory. This proves current route eligibility, not a completed inference for every mode.

Evidence: Exact ID assemblyai/universal-3-5-pro is directory-listed

Speech to text test status

The request contract and frontend path are ready. A real recorded output has not yet been captured for this exact model and mode.

Request contract: Build verified
/audio/transcriptions · Schema tests · 2026-08-05
Frontend path: Available
Speech to text form · 2026-08-05
Real model output: Not yet verified
No keyed smoke-test record

Try this model

Speech to text · AssemblyAI: Universal-3.5 Pro · Runs through the CLSSAI gateway at the official price; nothing is saved.

Providers

Compare published prices and endpoint capabilities. Select a provider for context limits, caching prices and supported parameters.


	Specialized	See source	--	--	100.00%

USD per 1M tokens. Prices and metrics describe catalog endpoints, not CLSSAI routing. “--” means no measurement was supplied. Uptime: last 30 minutes.

Specialized Media Pricing

This model uses media-specific billing units. Open a provider for the available pricing information.

Per-generation price unavailable

The source does not supply a verified per-generation amount. No token-equivalent price is inferred.

Performance

Latency and throughput history are not supplied by the public endpoint API. Check the catalog for its latest performance charts.

Uptime

Successful requests in the last 30 minutes, as reported by the catalog. A snapshot does not show historical reliability.

AssemblyAI100.00%

Benchmarks

No scored evaluations are included in the public model metadata. View the source for benchmarks and their methodology.

Apps

Application rankings require verified traffic data, which is not included in this source.

Activity

Historical token and request volumes are not supplied by the public API. The catalog shows activity on its own network.

Frequently asked questions

Provider availability, context limits and API capabilities.

Which providers serve AssemblyAI: Universal-3.5 Pro?

AssemblyAI are listed in the public reference data. Check CLSSAI availability above before making a request.

What context length is available for AssemblyAI: Universal-3.5 Pro?

No source-labelled context-length metadata was supplied.

Which API parameters does AssemblyAI: Universal-3.5 Pro support?

No source-labelled supported-parameter metadata was supplied.

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