Opera previews WebAI for local AI in Opera One
Opera introduced WebAI, a proposed web standard that lets websites and browser extensions use AI models running on the user’s device. The company says the implementation is model-agnostic, supports open-weight systems such as Google Gemma, and can access Apple’s on-device foundation model on Macs. The feature is an opt-in early preview in Opera One, with Opera GX and Opera Neon slated to receive it later, while local performance will depend on device hardware.
WebAI gives websites and extensions a browser-level interface for local inference without cloud infrastructure or per-request fees, as Opera says, while keeping locally processed information on the device.

Starting today, Opera One users can access a preview feature that lets them tap into local AI models through WebAI, a proposed web standard. Here are the details.
WebAI
Opera announced today that its Opera One browser is the first of its browsers to offer built-in access to local AI models, with Opera GX and Opera Neon to follow.
The feature relies on the WebAI proposed web standard, which allows websites and browser extensions to access AI models running locally on the user’s device.
Here’s Opera:
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