Skip to content

SPEV: free through Oct 31. Details →

Pricing

Only pay for the audio you send us and the audio we generate.

Chat with us if you need an organization account for Enterprise use.

What you would pay

vs
Mode
Batch is the base rate.

Competitor figures are public list prices for the closest comparable product, last checked June to September 2026. Where a provider sells capacity by subscription rather than by the hour, we use their best published tier. Committed use and enterprise agreements price differently on both sides. Speech to text compares against batch rates, which is the cheaper end of most of this field.

Sprag$75
Rhythm$0.075/hr
OpenAI$360
gpt-4o-transcribe$0.36/hr

You save

79%$285/mo

less than OpenAI at 1,000 hours of audio.

Start building

Rates

Batch rates. A realtime session over a WebSocket bills at 25% over these rates on Rhythm and Symphony, except speech out, which costs the same either way.

CapabilityModelDescriptionPrice
MultimodalSymphonyRealtime. Text, image, audio, and video in; text and speech out, with tool calling.$0.09/ hour of audio$1.98 per 1M input audio tokens$0.18 per 1M input text tokens$1.26 per 1M output text tokens$1.00 per hour of speech out
Symphony FastContact us
STTRhythmTranscribe audio in 30 languages. Streaming and batch.$0.075/ hour of audio submitted$2.08 per 1M audio tokens
SymphonyTranscribe audio. Streaming and batch.$0.09/ hour of audio$2.50 per 1M audio tokens
TTSChorusSynthesize speech in a built-in, cloned, or designed voice.
Speech, any voice$0.70/ hour of speech generated$19.44 per 1M audio tokens+ $1.00 per hour of inline reference audio
Save a voice$0.50/ voiceCloned or designed
Voice design previews$15.00/ 1M characters
TranslationSymphonyTranslate speech into text in another language.$0.09/ hour of audio$2.50 per 1M audio tokens
DecisionsSPEVAnswer predicate, choice, and score questions about text, audio, or an image.$0.09/ 1M input tokensText or image$2.00 per 1M input audio tokens

Audio is one token per 100 ms, so 36,000 tokens an hour, and an hour of transcribed speech returns roughly 15,000 output text tokens. An hour of synthesized speech consumes roughly 60,000 characters, on our models and on every provider priced per character. Token rates are only comparable between providers counting tokens the same way, which is why the hour leads.

See all model details

Accounts and limits

Everything that is not a per-request rate. If your answer is not here, talk to us.

Make your first request.