Opera proposes WebAI, a web standard for running AI models locally in the browser

Opera has introduced a proposed web standard called WebAI, TechCrunch reported on October 27, with a goal that reframes how AI reaches users: instead of sending every request to the cloud, models would run locally inside the browser.

The reported detail is narrow but pointed. WebAI is designed to work with a variety of AI models rather than a single vendor's stack, which makes it an interface-level proposal rather than a feature bolted onto one product.

Running AI in the browser is not a new idea, but standardizing it is a different proposition. Similar capabilities have so far arrived as vendor-specific APIs or experimental flags, so a developer who adopts one is tied to a particular browser. If WebAI gains cross-browser agreement, the distribution model for models changes: instead of calling a remote endpoint, applications would load weights onto the device.

That shift has three immediate consequences. Inference stays on the machine, so raw data need not leave it; vendors avoid paying cloud token costs for every interaction; and removing the network round trip makes responses feel close to instantaneous.

The trade-offs are just as concrete. Local inference is bounded by a device's compute, memory and battery, so how large a model can run depends on hardware. Downloading and updating weights, managing caches, and handling wildly uneven device performance are all engineering questions the standard would have to answer.

Opera's timing also reflects the browser landscape. AI assistants are becoming the new battleground, and whoever defines the relationship between AI and the page holds rule-making power at the entry point. Pushing it as an open standard is a way of moving the fight from product features to the layer that defines the rules.

Two things to watch: whether WebAI enters a formal standards process, and whether browsers and model makers beyond Opera endorse it. A standard with one supporter is a proposal; it starts changing the shape of the web only once others adopt it.