Speech RecognitionOpenAIOpen SourceMultilingualEnterprise

Whisper Large V3 API

Industry-leading speech recognition across 100+ languages with near-human accuracy.

Parameters

1.55B

Context

30 seconds (auto-chunked)

Organization

OpenAI

Pricing

$0.006

per minute of audio

Try Whisper Large V3 for Free

Quick Start

Start using Whisper Large V3 in minutes. VoltageGPU provides an OpenAI-compatible API — just change the base_url.

Python (OpenAI SDK)
pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://api.voltagegpu.com/v1",
    api_key="YOUR_VOLTAGE_API_KEY"
)

# Transcribe audio file
with open("meeting_recording.mp3", "rb") as audio_file:
    transcript = client.audio.transcriptions.create(
        model="whisper-large-v3",
        file=audio_file,
        response_format="verbose_json",
        timestamp_granularities=["word", "segment"]
    )

print(transcript.text)

# Access word-level timestamps
for word in transcript.words:
    print(f"[{word.start:.2f}s] {word.word}")
cURL
Terminal
curl -X POST https://api.voltagegpu.com/v1/audio/transcriptions \
  -H "Authorization: Bearer YOUR_VOLTAGE_API_KEY" \
  -F file="@meeting_recording.mp3" \
  -F model="whisper-large-v3" \
  -F response_format="verbose_json" \
  -F timestamp_granularities[]="word"

Pricing

ComponentPriceUnit
Speech Recognition$0.006per minute of audio

New accounts receive $5 free credit. No credit card required to start.


Capabilities & Benchmarks

Whisper Large V3 achieves a word error rate (WER) below 5% on English and under 10% on many other languages. It supports 100+ languages for transcription and automatic language detection. Features include word-level timestamps, speaker diarization hints, punctuation restoration, and translation from any supported language to English. The model handles audio formats including MP3, WAV, FLAC, M4A, OGG, and WebM.


About Whisper Large V3

Whisper Large V3 is OpenAI's most capable automatic speech recognition (ASR) model, supporting transcription and translation across 100+ languages. With 1.55 billion parameters, it achieves near-human accuracy on English speech and strong performance on dozens of other languages. Whisper V3 handles accented speech, background noise, technical jargon, and multiple speakers with remarkable accuracy. It supports automatic language detection, timestamps at word and segment level, and audio-to-text translation from any supported language to English.


Use Cases

🎙️

Meeting Transcription

Transcribe meetings, interviews, and conferences with accurate speaker identification.

🎧

Podcast Processing

Automatically transcribe podcasts for searchable archives, show notes, and accessibility.

📺

Subtitle Generation

Generate accurate subtitles and closed captions for video content in multiple languages.

🗣️

Voice Commands

Build voice-controlled applications with reliable speech-to-text conversion.

⚕️

Medical & Legal Dictation

Transcribe professional dictation with support for domain-specific terminology.


API Reference

Endpoint

POSThttps://api.voltagegpu.com/v1/audio/transcriptions

Headers

AuthorizationBearer YOUR_VOLTAGE_API_KEYRequired
Content-Typeapplication/jsonRequired

Model ID

openai/whisper-large-v3

Use this value as the model parameter in your API requests.

Example Request

curl -X POST https://api.voltagegpu.com/v1/audio/transcriptions \
  -H "Authorization: Bearer YOUR_VOLTAGE_API_KEY" \
  -F file="@meeting_recording.mp3" \
  -F model="whisper-large-v3" \
  -F response_format="verbose_json" \
  -F timestamp_granularities[]="word"



Frequently Asked Questions

What languages does Whisper V3 support?

Whisper V3 supports transcription in 100+ languages including English, Chinese, Spanish, French, German, Japanese, Korean, Arabic, Hindi, Portuguese, Russian, and many more. It can also translate speech from any supported language into English text.

How accurate is Whisper V3?

Whisper V3 achieves below 5% word error rate (WER) on clean English speech, comparable to professional human transcriptionists. On other languages, accuracy varies but typically achieves 5-15% WER for well-represented languages.

What audio formats are supported?

Whisper V3 accepts MP3, WAV, FLAC, M4A, OGG, WebM, and other common audio formats. The maximum file size is typically 25MB, with longer files automatically chunked for processing.

Can Whisper V3 handle multiple speakers?

Whisper V3 transcribes all speech in an audio file but does not natively distinguish between speakers. For speaker diarization (identifying who said what), you can combine Whisper with a separate diarization model.

How much does it cost to transcribe 1 hour of audio?

At $0.006 per minute, transcribing 1 hour of audio costs $0.36. This makes Whisper V3 via VoltageGPU one of the most affordable transcription options available, significantly cheaper than human transcription ($1-3/minute) and most competing APIs.


Start using Whisper Large V3 today

Get $5 free credit when you sign up. No credit card required. Deploy in under 30 seconds with our OpenAI-compatible API.