Voice, image and video

Speech to text cost calculator

Monthly transcription cost by audio minutes, with every listed API priced for comparison.

monthly cost0.00

Prices read from the vendor pages on 2026-10-20. Arithmetic on list prices, not advice or a quote.

Pro

Saving and exports need Norwell Tools Pro, $9 a month. See what is in it. Everything above is free.

How it works

Transcription is billed per minute (or hour) of audio. Streaming is often billed on session time, so an open socket with silence still costs. Diarization, language detection and other add-ons are extra at most vendors.

The formula

monthly = minutes * per_minute

Worked example

With the inputs the page opens on:

audio minutes per month: 20000 minutes
api: openai-whisper

gives

monthly cost: $120
cost per hour: $0.360
cheapest api: AssemblyAI Universal-2
cheapest monthly: $50

Sources

https://developers.openai.com/api/docs/pricing (read 2026-10-20)
https://deepgram.com/pricing (read 2026-10-20)
https://www.assemblyai.com/pricing (read 2026-10-20)
https://docs.mistral.ai/inference/pricing (read 2026-10-20)
https://ai.google.dev/gemini-api/docs/pricing (read 2026-10-20)

Prices read from each vendor's own pricing page on 2026-10-20; the page may have changed since. This is arithmetic on published list prices, not advice or a quote. Check the vendor's page before committing a budget.

Questions

Is Whisper on Deepgram the same price as OpenAI's?

No: Deepgram lists Whisper Large at 0.0048 a minute, OpenAI lists Whisper at 0.006 a minute, on the pages read.

Related tools

Text to speech cost calculator

Monthly cost of text to speech by characters: per-character APIs side by side with the ElevenLabs plan that covers the volume.

Image generation cost calculator

Monthly cost of generated images by model and output size.

AI video cost calculator

Monthly cost of generated video by minutes: per-second video APIs against the Synthesia plan that covers the minutes.