Speechify

Developer of the Simba speech-model family and the SpeechifyAI developer API. Developer API billing is separate from the consumer Reader app.

Simba 3.2, 3.0, the two legacy Simba 1.6 engines, historical Base/Turbo and the catalog-documented Dialogue 1.0 reviewed. Private deployments, full workspace voice inventories and exact Dialogue entitlement remain unresolved.

Closed-weight models

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What does one question cost?

Compare every model with the same request.

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.

7 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
2,000 spoken characters in speech; 20,000 characters including markup in streamtext input	WAV, MP3, OGG, AAC, PCM, μ-lawoutput formats	Usage pricing $10.00 / 1M spoken charactersSpeech synthesis · Starter · SpeechifyAI API$10.00 / monthPlan fee · Starter · SpeechifyAI APIFree: 500K characters/month, then pause. Paid monthly fees: Starter $10, Pro $99, Scale $499Rates & conditions ↗	Different billing unitPrice details ↗
2,000 spoken characters in speech; 20,000 characters including markup in streamtext input	WAV, MP3, OGG, AAC, PCM, μ-lawoutput formats	Usage pricing $10.00 / 1M spoken charactersSpeech synthesis · Starter · SpeechifyAI API$10.00 / monthPlan fee · Starter · SpeechifyAI APIFree: 500K characters/month, then pause. Paid monthly fees: Starter $10, Pro $99, Scale $499Rates & conditions ↗	Different billing unitPrice details ↗
2,000 spoken characters in speech; 20,000 characters including markup in streamtext input	WAV, MP3, OGG, AAC, PCM, μ-lawoutput formats	Usage pricingNot collected	Different billing unitPrice details ↗
2,000 spoken characters in speech; 20,000 characters including markup in streamtext input	WAV, MP3, OGG, AAC, PCM, μ-lawoutput formats	Usage pricingNot collected	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 ↗
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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