Fact · Transcription
512MB per audio file
OpenAI's help article says audio files uploaded to ChatGPT can be up to 512 MB.
Checked against its source on October 17, 2026
In the source's own words
“Audio files can be up to 512 MB.”
Uploading files and audio to ChatGPT, OpenAI Help Center (archived copy), 2026, Audio upload and processing limits.
Open the original- What it measures
- The limit is a file size, not a length. The same article covers uploads on the web and in supported apps.
- What it does not show
- A 512 MB file holds different amounts of speech depending on its format and bit rate, so it does not map to a fixed number of minutes. The limit may change.