AssemblyAI

Native speech recognition models for recorded audio and live conversations, with domain-specific transcription add-ons.

Six currently documented base speech models, Medical Mode v1, and two deprecated Universal-3 Pro variants. Historical Conformer, Universal-1 and Slam-1 releases remain under review. API products and routing tiers are not counted as separate model releases.

Closed-weight models

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Input tokensOutput tokens

Estimate = (input tokens × input price + output tokens × output price) / 1,000,000. Include conversation history in input and billed reasoning in output. Input-only decision models ignore the output setting; enter all billed input for one decision, including its question and criteria. Media, tools and discounts are separate.

9 models

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Model input and output limits, prices and estimated cost per question at the selected token counts.
Input tokensPublished limit*	Output tokensMaximum per response*	Input pricePer 1M tokens	Cost per question1,000 input + 500 outputEstimated · uncached
Async: up to 10 hoursaudio limit	Not collected	Usage pricing $0.21 / audio hourPre-recorded transcription · AssemblyAI API$0.30 / audio hourSynchronous transcription · AssemblyAI API · SyncRates & conditions ↗	Different billing unitPrice details ↗
Async: up to 10 hoursaudio limit	Not collected	Usage pricing $0.15 / audio hourPre-recorded transcription · AssemblyAI APIRates & conditions ↗	Different billing unitPrice details ↗
Session auto-closes after 3 hoursaudio limit	Not collected	Usage pricing $0.45 / session hourStreaming transcription · AssemblyAI API · StreamingRates & conditions ↗	Different billing unitPrice details ↗
Session auto-closes after 3 hoursaudio limit	Not collected	Usage pricing $0.45 / session hourStreaming transcription · AssemblyAI API · StreamingRates & conditions ↗	Different billing unitPrice details ↗
Session auto-closes after 3 hoursaudio limit	Not collected	Usage pricing $0.15 / session hourStreaming transcription · AssemblyAI API · StreamingRates & conditions ↗	Different billing unitPrice details ↗
Session auto-closes after 3 hoursaudio limit	Not collected	Usage pricing $0.15 / session hourStreaming transcription · AssemblyAI API · StreamingRates & conditions ↗	Different billing unitPrice details ↗
Not collected	Not collected	Usage pricing $0.15 / audio hourMedical domain correction · AssemblyAI API$0.15 / session hourMedical domain correction · AssemblyAI API · StreamingRates & conditions ↗	Different billing unitPrice details ↗
Not collected	Not collected	Usage pricingNot collected	Different billing unitPrice details ↗
Not collected	Not collected	Usage pricingNot collected	Different billing unitPrice details ↗

* Media models show their native limits. A shared context window includes both input and output tokens.

Original currency and billing unit, without currency conversion. Rates are dated snapshots; open the conditions for tiers, promotions and endpoint restrictions.How to read the data

Catalog coverage

Closed-weight model variants and explicitly identified closed-source managed model components across language, code, image, video, audio and other documented modalities. Global provider and historical-release coverage is being expanded; this is not yet exhaustive. 172 company reviews are still open.

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