Prices retain their published currencies and billing units below.
Published billing units · original currency · observed 13 Oct 2026
Category
Usage
Rate
Unit
Speech synthesis
Text input1
$0.011
1,000 characters
Rate conditions
Published rate per 1,000 characters; first one million characters free. Frequency/reset of that allowance is not specified. Model-training STT discount does not apply. Older preview copy saying all usage is free is not used as current pricing.
The preview guide says input text and generated audio are retained to improve the service. Current general terms require training opt-in, creating a documentation discrepancy. A non-retentive TTS contract is not assumed; verify deployment terms.
On-premises deployment is offered through an enterprise agreement; hardware and numeric price not collected.
Regions
Customer-controlled
Endpoint pricing has not been collected. Check the provider for applicable rates.
Data & enterprise terms
Licensed deployment in customer-controlled infrastructure. Cloud retention rules do not describe a locally integrated model. Exact licensing and telemetry terms depend on the deployment agreement.
Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.
01 / INITIAL INPUTProcess & retain
The system processes eligible input and retains reusable state.
02 / LATER REQUESTCheck available state
Reuse depends on matching input, session state and the cache policy.
03 / CACHE HITReuse & generate
Reusing state can reduce repeated work. Any charges follow the billing rules below.
Speechmatics API
Not verified
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
How it works
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Minimum reusable input
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Lifetime & refresh
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
How to enable it
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Usage fields
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Billing rules
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Limits & data boundaries
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
Speechmatics licensed deployment
Not verified
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
How it works
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Minimum reusable input
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Lifetime & refresh
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
How to enable it
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Usage fields
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Billing rules
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
Limits & data boundaries
Not collected
No provider prompt-cache contract collected. Custom vocabulary, cached generated audio files and local Docker image caching do not establish model prompt caching.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
Voice choices
4 voices
Choose a voice within Speechmatics Text-to-Speech. These are API voice identifiers, not additional model releases. Source links document each voice.
No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.
Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.
The record behind the model
Why it is included
Speechmatics identifies these as its own models or software, retains the software intellectual property and prohibits alteration/reverse engineering. Licensed containers and a native library do not grant an open model-weight license; SDK source availability is separate.