Opera WebAI brings AI models inside the browser. On 27 October 2026, Opera announced in Oslo that it had begun shipping local AI models in its browsers: the first capabilities, under the name WebAI, arrive as an opt-in early preview in its flagship browser, Opera One, with the gaming browser Opera GX and the agentic browser Opera Neon to follow at an unspecified date.
What WebAI is
WebAI is a web standard proposed by Opera, which says it is backed by companies such as Google and Microsoft. The idea is to let websites and browser extensions call local models hosted through the browser instead of sending every request to the cloud. Opera's implementation is not tied to one model provider and uses open-weight models only: at launch, Google's Gemma is available, and on Macs, Apple's on-device foundation model can be used as well.
With WebAI, text can be generated, content classified and relationships between pieces of content understood, all directly in the browser. Opera's examples are concrete: an extension could sort tabs, flag clickbait or spot relevant job posts on the user's own computer, with no account, no subscription, and no need to send the information to an AI provider.
Off by default, with permission per site
Running models locally first raises a question of trust. WebAI is off by default and nothing is downloaded until the user turns it on; each website needs separate permission to use local AI. Opera also notes that because the model runs on the user's own device, performance depends on their hardware. The preview is currently available on 64-bit Windows PCs (Intel or AMD processors) and Macs with Apple silicon.
This is not Opera's first move into local models. In 2024, it was the first major browser to offer built-in access to local models in an experimental developer build; this release takes the same idea from developers to everyday users. The same announcement also introduced HTML-in-Canvas, which places real, interactive web pages inside 2D and 3D scenes, aimed mainly at games and Opera GX.
WebAI's real test now is not technical but in the word "standard": today it only runs in Opera. If support from Google and Microsoft stays on paper, extensions built for WebAI will only reach Opera users; only if more browsers adopt it can local AI move from one browser's selling point to a general capability of the web. Local models are also suited to lighter tasks, while the heaviest frontier workloads still need the cloud — as Opera itself puts it, much of what people want from AI does not need a data center, not all of it.
