If I go directly to the URL it wants me to agree to some stuff before I even know what the service is. I had to come to these comments to figure that out (without agreeing to anything first).

It's baffling that this requires auth. OpenAI's own tool (https://openai.com/research/verify/) doesn't require auth.

Even Google themselves previously offered a no-auth way (just very niche): if you uploaded an image to Google Image search, and went to "About this image", it would show if the image was Google AI-generated. Now it doesn't.

Finally, the previous implementations were very silly! OpenAI had a nice tool, but it only detected their own watermarks, and Google's process was "upload the image to Gemini and ask if it's AI generated", which seemed like a perplexing waste of tokens and breath.

(While a sibling comment points out putting the image through Google Image Search as an alternative, I don't remember this being signposted in the support article I've read, so I unfortunately didn't know about it)

It's a real shame Google isn't more transparent about how it actually works, and doesn't provide any mechanism for classifying images in bulk or offline.

This is the best SynthID write-up I've found so far: https://fyx.me/articles/attempting-model-extraction-of-googl...

It covers how it actually works (probably), and how to train your own classifier for it, with some seemingly decent results.

Here is openai:

https://help.openai.com/en/articles/8912793-provenance-signa...

There is rate limit though

Why the hell do I need to sign in?

Wouldn't it be easy to just generate a training dataset and use a model to identify and remove said watermarks?

I worry we’ll have to approach this the other way around: verify that photos came from a camera, using hardware support like Apple’s Reference Image, rather than try to detect every AI generated one.

In many situations, photos are evidence. AI tools make convincing fakes, such as images of defect product.

No option to detect generated text. SynthID also watermarks text, right?

There is a rate limit of around 10 checks in 24 hours.

(2025)? https://blog.google/innovation-and-ai/products/google-synthi...

Or did it just become public

Edit:

Blog post today https://blog.google/innovation-and-ai/models-and-research/go...

Deepwalker cracked this one long time ago

https://deepwalker.xyz/blog/evaluating-synthid-watermark-rob...

Hey OpenAi, generate a text of 100 words.

Hey Gemini, find a synonym for every second adjective. Replace in text.

Hey Grok, find a synonym for every third proper noun. Replace in text.

Hey …

This is a Google Deepmind project to “Identify AI generated media”

More detail at https://deepmind.google/models/synthid/

For those who, like me, were hoping it was a vision model to identify synthesizer models from photos of concerts and music studios!

is this by Google?

Can’t be used without signing in with a Google, Apple, or ChatGPT account.

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