Keyword boosting changes decoding and requires no retraining. It is not evidence of fine-tuning. The main STT guide still gives an older 7–55 delay range.
Native transcription API. Streaming socket and whole-file REST have different input handling; language/translation settings required.
Regions
Default API routes to the nearest cluster without residency commitment. Paid enrolled organizations can pin EU or US inference; account data and custom voices remain in the EU, including for US inference.
Prices retain their published currencies and billing units below.
Published billing units · original currency · observed 13 Oct 2026
Category
Usage
Rate
Unit
Speech usage
Transcription · XS overage1
$0.7452
audio hour
Subscription
Plan fee · XS2
$13.00
month
Speech usage
Transcription · S overage3
$0.54
audio hour
Subscription
Plan fee · S4
$43.00
month
Speech usage
Transcription · M overage5
$0.432
audio hour
Subscription
Plan fee · M6
$340.00
month
Speech usage
Transcription · L overage7
$0.4104
audio hour
Subscription
Plan fee · L8
$1,615.00
month
Rate conditions
XS: $13/month includes 225,000 shared credits. Extra usage costs $6.9 per 100,000 credits and must be enabled. Included credits expire at month end; remaining pay-as-you-go credits roll over. Derived overage rate, not the effective rate of included credits. Annual billing and enterprise contracts are separate. Uses the documented credit multiplier; no text-token conversion.
Includes 225,000 credits shared across speech products. Do not add the full subscription to every request. Monthly billing selected; annual pricing is a separate commitment.
S: $43/month includes 900,000 shared credits. Extra usage costs $5 per 100,000 credits and must be enabled. Included credits expire at month end; remaining pay-as-you-go credits roll over. Derived overage rate, not the effective rate of included credits. Annual billing and enterprise contracts are separate. Uses the documented credit multiplier; no text-token conversion.
Includes 900,000 credits shared across speech products. Do not add the full subscription to every request. Monthly billing selected; annual pricing is a separate commitment.
M: $340/month includes 9,000,000 shared credits. Extra usage costs $4 per 100,000 credits and must be enabled. Included credits expire at month end; remaining pay-as-you-go credits roll over. Derived overage rate, not the effective rate of included credits. Annual billing and enterprise contracts are separate. Uses the documented credit multiplier; no text-token conversion.
Includes 9,000,000 credits shared across speech products. Do not add the full subscription to every request. Monthly billing selected; annual pricing is a separate commitment.
L: $1615/month includes 45,000,000 shared credits. Extra usage costs $3.8 per 100,000 credits and must be enabled. Included credits expire at month end; remaining pay-as-you-go credits roll over. Derived overage rate, not the effective rate of included credits. Annual billing and enterprise contracts are separate. Uses the documented credit multiplier; no text-token conversion.
Includes 45,000,000 credits shared across speech products. Do not add the full subscription to every request. Monthly billing selected; annual pricing is a separate commitment.
Paid plans can disable speech-session payload retention in organization Privacy Settings; this is opt-in, not a universal default. Standard ZDR excludes voice-design prompts and clone samples. Enterprise can contract extended coverage. Terms permit improvement/training use unless ZDR is activated; feedback has separate handling.
Native transcription API. Streaming socket and whole-file REST have different input handling; language/translation settings required.
Regions
Default API routes to the nearest cluster without residency commitment. Paid enrolled organizations can pin EU or US inference; account data and custom voices remain in the EU, including for US inference.
Reads entire audio body before transcription, then streams NDJSON. This is not live bidirectional audio input or a separate batch inference API.Source for Request mode (opens in a new tab)
Prices retain their published currencies and billing units below.
Published billing units · original currency · observed 13 Oct 2026
Category
Usage
Rate
Unit
Speech usage
Transcription · XS overage1
$0.7452
audio hour
Subscription
Plan fee · XS2
$13.00
month
Speech usage
Transcription · S overage3
$0.54
audio hour
Subscription
Plan fee · S4
$43.00
month
Speech usage
Transcription · M overage5
$0.432
audio hour
Subscription
Plan fee · M6
$340.00
month
Speech usage
Transcription · L overage7
$0.4104
audio hour
Subscription
Plan fee · L8
$1,615.00
month
Rate conditions
XS: $13/month includes 225,000 shared credits. Extra usage costs $6.9 per 100,000 credits and must be enabled. Included credits expire at month end; remaining pay-as-you-go credits roll over. Derived overage rate, not the effective rate of included credits. Annual billing and enterprise contracts are separate. Uses the documented credit multiplier; no text-token conversion.
Includes 225,000 credits shared across speech products. Do not add the full subscription to every request. Monthly billing selected; annual pricing is a separate commitment.
S: $43/month includes 900,000 shared credits. Extra usage costs $5 per 100,000 credits and must be enabled. Included credits expire at month end; remaining pay-as-you-go credits roll over. Derived overage rate, not the effective rate of included credits. Annual billing and enterprise contracts are separate. Uses the documented credit multiplier; no text-token conversion.
Includes 900,000 credits shared across speech products. Do not add the full subscription to every request. Monthly billing selected; annual pricing is a separate commitment.
M: $340/month includes 9,000,000 shared credits. Extra usage costs $4 per 100,000 credits and must be enabled. Included credits expire at month end; remaining pay-as-you-go credits roll over. Derived overage rate, not the effective rate of included credits. Annual billing and enterprise contracts are separate. Uses the documented credit multiplier; no text-token conversion.
Includes 9,000,000 credits shared across speech products. Do not add the full subscription to every request. Monthly billing selected; annual pricing is a separate commitment.
L: $1615/month includes 45,000,000 shared credits. Extra usage costs $3.8 per 100,000 credits and must be enabled. Included credits expire at month end; remaining pay-as-you-go credits roll over. Derived overage rate, not the effective rate of included credits. Annual billing and enterprise contracts are separate. Uses the documented credit multiplier; no text-token conversion.
Includes 45,000,000 credits shared across speech products. Do not add the full subscription to every request. Monthly billing selected; annual pricing is a separate commitment.
Paid plans can disable speech-session payload retention in organization Privacy Settings; this is opt-in, not a universal default. Standard ZDR excludes voice-design prompts and clone samples. Enterprise can contract extended coverage. Terms permit improvement/training use unless ZDR is activated; feedback has separate handling.
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.
Gradium API
default
Not verified
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
How it works
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Minimum reusable input
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Lifetime & refresh
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
How to enable it
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Usage fields
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Billing rules
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Limits & data boundaries
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
Gradium API
default
Not verified
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
How it works
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Minimum reusable input
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Lifetime & refresh
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
How to enable it
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Usage fields
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Billing rules
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
Limits & data boundaries
Not collected
No reviewed model-specific prompt-cache contract. Reused WebSockets, stored voices and pronunciation dictionaries do not establish discounted prompt caching.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
What the measurements say
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
The proprietary service license reserves ownership of models and restricts copying, redistribution and extraction. Phonon is supplied as a separately licensed, partner-specific binary; offline deployment is not an open-weight license. Public SDKs and evaluation datasets do not grant production model weights.
