Question
Speech Recognition Accuracy
What it does, and how to check it yourself.
Speech recognition accuracy is usually measured as word error rate, and it changes with the audio more than with anything else. A headset in a quiet room gives a very different result from a phone on a table.
Checked November 2026 on each tool's own site. We ran no tests of our own.
Why are names and numbers often wrong?
They are rare or sound like other words, so the model guesses. A custom vocabulary helps with names, and numbers need a check by eye.