The LLM has suddenly become unavailable (Version 148.0.7778.168 (Official Build) (arm64))

[Paul Li]

It appears there might be an issue with Chrome Version 148.0.7778.168 (Official Build) (arm64). The LLM has suddenly become unavailable and cannot be accessed.

Are there any known issues or similar regressions reported for this build? Please find the relevant screenshots attached below for your reference.

[Wilson]

Check your chrome://policy/, 

look for the policy value of GenAILocalFoundationalModelSettings:

"When the policy is set to Allowed (0) or not set, the model is downloaded automatically, and used for inference.

When the policy is set to Disabled (1), the model will not be downloaded, and the existing model (if already downloaded) will be deleted."

[Thomas Steiner]

Hi Paul,

Can you send a screenshot of chrome://on-device-internals, specifically of the Model Status tab?

FWIW, it's working fine here, with the exact same Chrome version. 

Cheers,

Tom

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Thomas Steiner, PhD—Developer Relations Engineer (blog.tomayac.com, toot.cafe/@tomayac)

Google Spain, S.L.U.

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[Thomas Steiner]

Did you set any flags, Paul?

On Thu, May 14, 2026 at 2:46 PM Paul Li <mei.st...@gmail.com> wrote:

Yes. here comes the screenshots. 

[Paul Li]

I encountered a rather unusual issue during my development session. Everything was functioning correctly until the On-Device Model suddenly became unavailable.

Specifically, I noticed that the "On Device Model" entry has completely disappeared from chrome://components. To investigate whether this was a hardware limitation, I tested the same environment using Chrome Canary (Version 150.0.7839.0, arm64). Surprisingly, the Prompt API works perfectly fine in the Canary build.

I reset all flags. Only enable WebMCP now

[Thomas Steiner]

Alright, this should be the information we need. Could you please file a new Chromium bug with these details? Feel free to post the bug URL here, so I can triage it to the right team.   

[Paul Li]

Hi, Thomas:

Here comes the issue. Thank you.

[Paul Li]

Problem resolved. 

Here are the steps I took to fix it:

1. Visited chrome://settings/system and found that the "On-device AI" setting was disabled.
2. Enabled the setting.
3. Opened DevTools > Console panel and ran "await LanguageModel.availability();" & "await LanguageModel.create();" .
4. The model discovery triggered and started downloading.

After checking chrome://on-device-internals/, the model is now ready. It is a bit strange, though, as I don't recall ever going to chrome://settings/system to turn the "On-device AI" setting off in the first place.

[Thomas Steiner]

Hi Paul,

This of course explains it. Could you update the bug accordingly, please? This setting is rather new, so maybe there was a mistake with its state when it was rolled out? Definitely let the team on the bug know that you didn't knowingly touch it. Thanks for the help!

Cheers,

Tom

Thomas Steiner, PhD—Developer Relations Engineer (blog.tomayac.com, toot.cafe/@tomayac)

Google Spain, S.L.U.

Torre Picasso, Pl. Pablo Ruiz Picasso, 1, Tetuán, 28020 Madrid, Spain

CIF: B63272603

Inscrita en el Registro Mercantil de Madrid, sección 8, Hoja M­-435397 Tomo 24227 Folio 25

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[Paul Li]

No problem, I've updated the ticket with the detailed steps. Hopefully, this helps the team track down the root cause. Thanks!