Speech-to-text

AssemblyAI vs OpenAI (STT)

AssemblyAI has the lower normalized list price (2.4× cheaper). 30 of 33 European languages are documented by both; 1 only by AssemblyAI, 0 only by OpenAI (STT).

AssemblyAI

$0.0025 /min

0.15 USD/hr (Universal-2; Universal-3.5 Pro 0.21/hr) · source · checked 2026-10-16

31/33 languages · language table (pre-recorded)

Try AssemblyAI →

OpenAI (STT)

$0.0060 /min

0.006 USD/min (gpt-4o-transcribe; realtime whisper 0.017/min) · source · checked 2026-10-16

30/33 languages · Whisper language list (shown on OpenAI TTS guide)

Try OpenAI (STT) →

Both · 30

bg hr cs da nl en et fi fr de el hu it lv lt pl pt ro sk sl es sv no uk tr sr ca is bs mk

Only AssemblyAI · 1

Only OpenAI (STT) · 0

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List prices, normalized to USD/min; see each provider page for assumptions. Language support from official docs. * = affiliate link; never affects comparisons.

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