Opera WebAI: local AI models built into the browser, no cloud needed
Opera began shipping local AI models in its browsers on 27 Oct 2026: WebAI, an opt-in early preview in Opera One, lets websites and extensions use on-device open-weight models (Google Gemma at launch, Apple's on-device model on Macs) via Prompt, Decision and Semantic Embeddings APIs, with no subscription, API key, or data sent to an AI service.
Why it matters
The first major-browser push to make local AI a web platform: sites and extensions get AI without servers, per-request fees, or data leaving the device.
What you could build with it
An indie developer could build a browser extension that sorts open tabs, flags clickbait, and surfaces relevant job posts using the laptop's own model, with no server bill and no user data leaving the device.
Does it hold up?
Too early to judge: an opt-in early preview launched today, limited to 64-bit Windows Intel/AMD PCs and Apple-silicon Macs, with only Gemma and Apple's model at launch and no independent hands-on reports yet.
Built with Opera WebAI
- Opera Launches WebAI, Bringing Local AI Models to Its Browsersarticle · Launch coverage: opt-in early preview in Opera One, Gemma and Apple on-device models at launch, six experimental example extensions including a tab sorter and clickbait flagger.
- Opera Launches WebAI to Run Local AI Models in Its Browserarticle · Independent writeup confirming the model-agnostic design, the Prompt/Decision/Embeddings APIs, and that Opera GX and Neon follow later.
Learn more
First spotted on article: source.
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