Specialist writing model family for grammatical correction, rephrasing, style and tone within a language. The API exposes operations rather than public checkpoint IDs.
Includes root-language aliases and regional variants. Chinese support is simplified; this list does not imply a separate model per code.
Generation controls
Choose writing_style OR tone, not both. Style: default, academic, business, casual or simple; tones: confident, diplomatic, enthusiastic or friendly. prefer_ forms allow fallback.Source for Generation controls (opens in a new tab)
Styles/tones: English, German, Spanish, French, Italian and Portuguese; other supported Write languages do not necessarily support these controls.
Prices retain their published currencies and billing units below.
Published billing units · original currency · observed 13 Oct 2026
Category
Usage
Rate
Unit
Language API usage
Growth Write overage1
$27.50
1M additional source characters
Rate conditions
Native India/USD price view, annual billing selected: Growth is $26/month billed annually, with 12M characters, 120 STT hours and 60 S2S hours per year. Usage above those allowances is extra. This is a shared account plan, not an extra subscription for every model/endpoint. 50M characters and 300 voice hours/month limits; Enterprise is custom. $27.50 per million additional characters, not tokens. Unicode code points of source text are billed; output tokens have no separately collected price. Document minimums and beta exceptions apply.
Paid Growth API advertises no data training. Terms allow temporary processing storage, encrypted exceptional debugging retention up to 72 hours, and metadata logs. Customer-requested stored content has separate deletion terms. Region is not universally fixed; enterprise residency requires agreement. Free Developer terms differ.
Includes root-language aliases and regional variants. Chinese support is simplified; this list does not imply a separate model per code.
Prices retain their published currencies and billing units below.
Published billing units · original currency · observed 13 Oct 2026
Category
Usage
Rate
Unit
Language API usage
Growth Write overage1
$27.50
1M additional source characters
Rate conditions
Native India/USD price view, annual billing selected: Growth is $26/month billed annually, with 12M characters, 120 STT hours and 60 S2S hours per year. Usage above those allowances is extra. This is a shared account plan, not an extra subscription for every model/endpoint. 50M characters and 300 voice hours/month limits; Enterprise is custom. $27.50 per million additional characters, not tokens. Unicode code points of source text are billed; output tokens have no separately collected price. Document minimums and beta exceptions apply.
Paid Growth API advertises no data training. Terms allow temporary processing storage, encrypted exceptional debugging retention up to 72 hours, and metadata logs. Customer-requested stored content has separate deletion terms. Region is not universally fixed; enterprise residency requires agreement. Free Developer terms differ.
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.
DeepL API
Not verified
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
How it works
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Minimum reusable input
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Lifetime & refresh
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
How to enable it
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Usage fields
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Billing rules
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Limits & data boundaries
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
DeepL API
Not verified
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
How it works
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Minimum reusable input
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Lifetime & refresh
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
How to enable it
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Usage fields
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Billing rules
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model prompt caching.
Limits & data boundaries
Not collected
No discounted prompt-cache contract collected. Glossaries, translation memories, retained files and reconnectable sessions are not proof of model 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
DeepL terms identify proprietary models and restrict copying or reverse engineering of the service. This is a documented proprietary generation or explicitly identified managed/research family, not a claim that every hosted partner component is a DeepL checkpoint. Public model weights are not provided by the cited release or API documentation.
