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AssemblyAI · First-party API · STT

u3-pro

DeprecatedDeprecated · removal date not published

Provider-recommended replacement: u3-rt-pro

AssemblyAI has deprecated u3-pro. The replacement AssemblyAI recommends is u3-rt-pro. Source: assemblyai.com · Last checked Oct 23, 2026

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Notice

Deprecated

Deprecated · removal date not published

AssemblyAI marks this model as deprecated. No removal date is published in this notice.

Hosting route
First-party API
Affected scope
Not stated in the notice
Replacement
u3-rt-pro
Announced
Jun 3, 2026
First seen by ModelClock
Oct 15, 2026

What the provider published

assemblyai.com ↗

# Streaming: speech_model Now Optional

What to know

  • u3-pro is deprecated — use u3-rt-pro instead

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u3-pro shutdown date

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