Speech (TTS / STT)
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AssemblyAI

Speech-to-text with audio intelligence (sentiment, topics, entities).

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#4of 5 · Speech (TTS / STT)
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Pricing

AssemblyAI pricing

Usage-based pricing
  • Pre-recorded STT — Universal-3 Pro$0.21 / per hr
  • Pre-recorded STT — Universal-2$0.15 / per hr
  • Pre-recorded Add-on — Keyterms Prompting (Universal-3 Pro)$0.05 / per hr
  • Pre-recorded Add-on — Prompting Beta (Universal-3 Pro)$0.05 / per hr
  • Pre-recorded Add-on — Speaker Diarization$0.02 / per hr
  • Pre-recorded Add-on — Medical Mode$0.15 / per hr
  • Realtime STT — Universal-3 Pro Streaming$0.45 / per hr
  • Realtime STT — Universal-Streaming$0.15 / per hr
Enterprise — Get custom rate limits, enhanced concurrency, and enterprise-grade flexibility tailored to your AI workloads.Contact sales →

Free tier includes up to 185 hours of pre-recorded transcription and up to 333 hours of streaming transcription. Effective July 1, 2026, in-region LLM Gateway model pricing will increase by 10% due to provider cost increases; add 'model_region': 'global' to API requests to maintain current pricing. Multichannel audio is billed per channel.

Last verified Jun 11, 2026 · source ↗