How Descript enables multilingual video dubbing at scale

Descript is an AI-native video editor designed so editing text edits video.

Descript/OpenAI uses OpenAI for transcription and GPT models inside its co-editor Underlord.

Translation became a high-impact use case, and Descript rebuilt its translation pipeline with OpenAI reasoning models to optimize semantic fidelity and duration adherence.

After rollout, exported translated videos with dubbing rose 15% in the first 30 days; duration adherence improved by 13–43 percentage points depending on language.

Dubbing requires both semantic fidelity and strict duration adherence to avoid unnatural pacing; German is an example of a language that often runs longer than English.