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Documentation Index

Fetch the complete documentation index at: https://docs.cartesia.ai/llms.txt

Use this file to discover all available pages before exploring further.

Try out Ink 2, which provides improved turn detection for English voice agents.
Ink is a family of streaming speech-to-text (STT) models for developers building real-time voice applications.
  • the latest stable snapshot of the model

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ink-whisper

Ink Whisper is the fastest, most affordable speech-to-text model — engineered for enterprise deployment in production-grade voice agents. It delivers higher accuracy than baseline Whisper and is optimized for real-time performance in a wide variety of real-world conditions. Additional Capabilities:
  • Handles variable-length audio chunks and interruptions gracefully using dynamic chunking.
  • Reliably transcribes speech with background noise.
  • Accurately transcribes audio with telephony artifacts, accents, and disfluencies.
  • Excels at transcribing proper nouns and domain-specific terminology.
SnapshotRelease DateLanguagesStatus
ink-whisper-2025-06-04June 4, 2025en, zh, de, es, ru, ko, fr, ja, pt, tr, pl, ca, nl, ar, sv, it, id, hi, fi, vi, he, uk, el, ms, cs, ro, da, hu, ta, no, th, ur, hr, bg, lt, la, mi, ml, cy, sk, te, fa, lv, bn, sr, az, sl, kn, et, mk, br, eu, is, hy, ne, mn, bs, kk, sq, sw, gl, mr, pa, si, km, sn, yo, so, af, oc, ka, be, tg, sd, gu, am, yi, lo, uz, fo, ht, ps, tk, nn, mt, sa, lb, my, bo, tl, mg, as, tt, haw, ln, ha, ba, jw, su, yueStable
To learn how to use the Ink STT family, see the Speech-to-Text API Reference.

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Continuous updates

All models have a base model name (e.g. ink-whisper) and a dated snapshot (e.g. ink-whisper-2025-06-04). Using the base model will automatically keep you up to date with the most recent stable snapshot of that model. If pinning a specific version is important for your use case, we recommend using the dated version.
Model IDModel update behaviorRecommended for
ink-whisper-YYYY-MM-DDSnapshotted, will never changeCustomers who want to run internal evals before any updates
ink-whisperWill be updated to point to the most recent stable snapshotCustomers who want stable releases, but want to be up-to-date with the recent capabilities
When making API calls, you can specify either: 
# Use the base model
# (automatically routes to the latest stable snapshot)
model = "ink-whisper"

# Or specify a particular snapshot for consistency
model = "ink-whisper-2025-06-04"