Depends on where you get it. By default the flags will be enabled, but some packagers may choose to disable them. I haven't seen a major distro release chromium 148 yet.

Weirdly though, chromium won't be able to actually use the model even though it can download it, because the inference engine is a closed-source blob.

https://adsm.dev/posts/prompt-api/#which-browsers-support-th...