Fact · Transcription
224tokens in a Whisper prompt
OpenAI says Whisper does not follow instructions the way a general-purpose text model does, and that its prompt accepts up to 224 tokens.
Checked against its source on October 17, 2026
In the source's own words
“Whisper doesn’t follow instructions like a general-purpose text model and accepts prompts of up to 224 tokens.”
Speech to text (OpenAI API guide), OpenAI, OpenAI, 2026, Improving reliability, prompt parameter.
Open the original- What it measures
- The guide describes the prompt parameter as a way to pass a list of correct spellings, not as an instruction.
- What it does not show
- The 224-token limit is for the prompt parameter in the OpenAI API.