Can I use 3P MaaS models from Vertex AI with my GCP Developer Credits?

I’m exploring model variety to my application, right now Gemini 3.1 Flash works wonderfully for me though doesn’t meet my needs 100% of the time

I’m considering using GLM 5.1 and Claude Sonnet for execution tasks, but for testing I’m using my GCP Developer credits that’s worth $10 from my AI pro plan (though If I upgrade to Ultra I get $100 a month)

As far as I can understand is I can use it as:

all of Google Cloud Platform and Google Maps APIs.

But it doesn’t say or documented if marketplace offerings are covered, which I believe it includes MaaS 3P models from vertex.

Can I use Google Developer Program premium benefit - CREDIT_TYPE_MONTHLY credit to use these 3rd party models from vertex?