AssemblyAI · First-party API · STT

Universal-3.5

Capability changeCapability change announced Aug 1, 2026

Capability change announced Aug 1, 2026 for Universal-3.5 on AssemblyAI. Source: assemblyai.com · Last checked Oct 23, 2026

2 notices

Capability change

Capability change announced Aug 1, 2026

AssemblyAI documents a capability change: “Universal-3.5 Pro is now our flagship speech model, with the highest accuracy we've released to date across 18 languages.”

Hosting route
First-party API
Affected scope
Not stated in the notice
Announced
Aug 1, 2026
First seen by ModelClock
Oct 14, 2026

What the provider published

assemblyai.com ↗

Universal-3.5 Pro is now our flagship speech model, with the highest accuracy we've released to date across 18 languages.

Read from the provider's text; the quote is the provider's exact lines.

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Capability change

Capability change announced Jul 29, 2026

AssemblyAI documents a capability change: “A regression introduced on July 15 caused most words on Universal-3 Pro and Universal-3.5 Pro to return end timestamps exactly 80 ms after start, regardless…”

Hosting route
First-party API
Affected scope
Not stated in the notice
Announced
Jul 29, 2026
First seen by ModelClock
Oct 14, 2026

What the provider published

assemblyai.com ↗

A regression introduced on July 15 caused most words on Universal-3 Pro and Universal-3.5 Pro to return end timestamps exactly 80 ms after start, regardless of actual word duration…

Read from the provider's text; the quote is the provider's exact lines.

Revision history

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Raw history JSON

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Universal-3.5 shutdown date

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