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Whisper

Free tier

OpenAI's open-source speech recognition — best-in-class accuracy across 99 languages.

Free·Technical·Powered by OpenAI·API available·Open source

Key strengths

Multilingual speech recognition and transcriptionTranslation from multiple languages into EnglishRobustness to accents, background noise, and technical languageTrained on 680,000 hours of multilingual and multitask supervised data50% fewer errors than specialized models in zero-shot evaluationOpen-source models and inference code (MIT License)
Completely free
San Francisco, US
Founded 2022
Self-hostable

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Whisper — Developer Use Cases

Whisper is well-suited for developers and researchers building applications that require reliable, large-scale, or multilingual speech processing:

  • Voice interface development: Integrate Whisper as the ASR backbone for voice-controlled applications, assistants, or command systems that must handle diverse accents and noisy real-world audio.
  • Multilingual transcription pipelines: Build automated transcription workflows for audio or video content across multiple languages, leveraging Whisper's broad language coverage.
  • Speech-to-English translation: Use Whisper's built-in translation capability to create pipelines that ingest non-English audio and output English text without a separate translation step.
  • Research & benchmarking: Evaluate Whisper's zero-shot performance (50% fewer errors than specialized models) as a baseline for ASR research or to benchmark domain-specific fine-tuning.
  • Accessibility tooling: Power captioning, subtitling, or transcription services that require robustness to technical language and varied speaker profiles.
  • Self-hosted, privacy-sensitive deployments: Deploy on-premises for use cases where audio data cannot leave a controlled environment.
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