Inference APIs

Measured accuracy

ModelWord error rateCharacter error rateClips with no errorsEmpty transcriptsSpeed
Whisper Large v3
openai/whisper-large-v3
28%8.4%0 of 300 of 300.076× real time
Parakeet TDT 0.6B v3
nvidia/parakeet-tdt-0.6b-v3
23%7.1%1 of 300 of 300.047× real time

Fair. Gets the content across, but needs a human pass before it is published or quoted. The clips are clean, single-speaker read speech, so treat this as a best case for your own recordings. How we measured, and all 83 languages.

What a transcript looks like

The clip with the median error rate from the test, reference text against what the API returned.

SpokenSenovės tautos ir gentys pradėjo jas laikyti, kad lengvai gautų pieno, vilnos, mėsos ir odų.
Whisper Large v3Senovis tautos irgentys pradėjo jas laikyti, kad lengvai gautų pieno, vilnos, mėsos ir odu.
Parakeet (its median clip)Spoken: Gali būti naudinga įsigyti kortelę „Wild Card“, su kuria galima įeiti arba į tam tikrus Pietų Afrikos parkus, arba į visus Pietų Afrikos nacionalinius parkus.
Gal būti naudingais įgyti kortelę Wild Cards, kuria galima įeiti į tam tikrus Pietų Afrikos parkus arba į visus Pietų Afrikos nacionalinius parkus.

Language detection

All 10 clips we sent without a language field were identified as Lithuanian. Auto-detection is safe here; sending language=lt still skips the detection step.

Which model for Lithuanian

Parakeet TDT 0.6B v3 was the more accurate model on these clips (23% against 28%) and it is also the faster one. Start with nvidia/parakeet-tdt-0.6b-v3. Side by side.

Quickstart

The request is the OpenAI transcription request with a different base URL. language is optional.

cURL
curl https://api.inferenceapis.com/v1/audio/transcriptions \
  -H "Authorization: Bearer $INFERENCE_API_KEY" \
  -F "model=nvidia/parakeet-tdt-0.6b-v3" \
  -F "language=lt" \
  -F "file=@recording.mp3" \
  -F "response_format=verbose_json"
Python · openai SDK
import os
from openai import OpenAI

client = OpenAI(base_url="https://api.inferenceapis.com/v1", api_key=os.environ["INFERENCE_API_KEY"])
with open("recording.mp3", "rb") as f:
    r = client.audio.transcriptions.create(model="nvidia/parakeet-tdt-0.6b-v3", file=f, language="lt", response_format="verbose_json")
print(r.text)

Subtitles and timestamps

response_format=srt or vtt returns a subtitle file with cues of up to two lines, broken at sentence ends and pauses. verbose_json with timestamp_granularities[]=word returns a start and end time for every word if you want to build your own.

Cost

$0.002 per minute of audio on either model: $0.12 for an hour, $12 for a hundred hours. Duration is measured from the file you upload. There is no daily cap on minutes and no subscription; enough to run your own Lithuanian test.

FAQ

How accurate is Whisper for Lithuanian?

On 30 clean read-speech clips it made 28% word errors, about one word in 4. Gets the content across, but needs a human pass before it is published or quoted. Real recordings with noise, accents or several speakers will score worse.

Does language auto-detection work for Lithuanian?

In our test, yes: all 10 clips sent without a language were identified as Lithuanian. Sending language=lt still saves the detection step on every request.

Whisper or Parakeet for Lithuanian?

On the same clips Whisper Large v3 scored 28% and Parakeet 23%. Parakeet was more accurate here and is also the faster model, so start with it. Both cost $0.002 per minute.

Can it translate Lithuanian speech to English?

The API returns Lithuanian text. For English, transcribe first and translate the text with a chat model on the same key.

Related languages: Latvian (20%) · Polish (5.6%)