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OpenAI Whisper Guide: Transcribe and Translate Audio

OpenAI Whisper can transcribe multilingual recordings and translate speech into English. Learn which endpoint fits your task and what file, format, and pricing limits to check.
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OpenAI Whisper can transcribe multilingual audio and translate speech into English, but the right workflow depends on the output you need. For ordinary recordings that should stay in their spoken language, OpenAI currently recommends starting with gpt-transcribe. Use the Audio API’s whisper-1 translation endpoint when you need English text from non-English speech; it does not translate into arbitrary target languages.

What Whisper does—and when to choose it

OpenAI describes Whisper as a general-purpose speech recognition model trained on diverse audio. It supports multilingual speech recognition, language identification, and speech translation. It remains an Audio API option, though OpenAI’s current file-transcription guide recommends gpt-transcribe as the starting point for ordinary recorded speech in its original language. The guide identifies Whisper as useful for workflows such as timestamps, subtitles, and translation. See OpenAI’s speech-to-text guide and the Whisper model page.

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Transcription or translation: which result do you need?

Keep the spoken language with transcription

Transcription turns speech into text in the language spoken in the recording. For a typical completed recording where you want that original-language text, OpenAI’s current guide recommends starting with gpt-transcribe. Whisper can suit workflows requiring timestamped output or subtitle formats; check the guide for supported response formats and model-specific behavior.

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Translate speech into English

The documented Audio API translation endpoint uses whisper-1 and returns English text from audio in another language. OpenAI states, “This endpoint supports translation into English only.” It is not a general-purpose endpoint for choosing any target language. See the speech-to-text guide and translation API reference.

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Choose a workflow for the audio and output

Need Documented choice Important qualification
Recorded speech as text in its original language Start with gpt-transcribe, per OpenAI’s current guide Whisper is also an option; the documentation does not establish a controlled accuracy ranking between models.
English translation of non-English speech whisper-1 through the translation endpoint Translation is into English only.
Subtitles or timestamped segments/words Review Whisper’s documented output formats and timestamp options Available formats and details depend on the endpoint and request; consult the current guide.
Ongoing microphone, call, or media-stream audio Realtime transcription workflow Whisper does not support streaming; it is for file-based workflows.

OpenAI’s documentation does not provide a controlled comparative accuracy benchmark for Whisper versus newer transcription models, so choose by task and output requirements rather than assuming one model is categorically more accurate.

Prepare and submit an audio file

OpenAI’s current file-transcription guide lists mp3, mp4, mpeg, mpga, m4a, wav, and webm for transcription. The translation API reference additionally lists flac and ogg. Send a file object with identifying format metadata; the API reference recommends a filename with an extension and an appropriate content type. Check the relevant endpoint documentation before relying on a format, especially when switching between transcription and translation. References: speech-to-text guide, translation API reference, and transcription API reference.

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Check the upload limit for the model you are using

For legacy whisper-1 Audio API transcription uploads, OpenAI’s Help Center states a maximum request size of 25 MiB. That figure is not a universal limit for every current audio model or route: newer transcription routes can use different validation. Check the model-specific documentation for longer recordings and current constraints. See OpenAI’s Audio API FAQ.

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Language coverage and accuracy

OpenAI’s current speech-to-text guide says Whisper supports 98 languages. That is a coverage statement, not a guarantee of equal quality: OpenAI cautions that accuracy varies by language. Audio quality, accents, and the language itself can affect how useful the transcript is, so review the result when precision matters. See the speech-to-text guide.

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Streaming audio requires a different workflow

Whisper does not support streaming. For an already completed recording, use a file-based transcription or translation request. For ongoing audio—such as a live microphone, call, or media stream—OpenAI points to its Realtime transcription workflow. See the speech-to-text guide and Audio API FAQ.

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Whisper API pricing

OpenAI’s Whisper model page listed transcription at $0.006 per minute when checked on October 7, 2026. This is a dated price snapshot, not a promise that the rate will remain unchanged; consult the live Whisper model page for current pricing and model details.

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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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