The Prompt API
Chrome’s docs describe the Prompt API for calling built-in AI inside the browser. The page links to session management and structured output docs; the captured body does not disclose model, context window, pricing, or rollout details.
Why it matters: Chrome Prompt API clears HKR-H/K/R: native browser AI is a real hook, and session plus structured-output docs add usable detail. Model, context window, pricing, and release timing are not disclosed, keeping it in the lower featured band.