Gmail's Smart Compose feature is coming to Google Docs

For the time being, Smart Compose for Google Docs will be available in beta for G Suite users on the web, but a larger rollout is expected to happen next year.
G Suite users admitted in the beta should start seeing Smart Compose suggestions in Google Docs as soon as they start typing. To turn off Smart Compose, simply head to Tools / Preferences and uncheck “Show Smart Compose Suggestions.” Of course, the beta is only available in English.