"under the model" is a perfectly grammatical and usable phrase in written English.
You could use it to describe a particular plan or system, for example: "We will be operating under the new model starting next week."
Under the model pioneered by Apple, and followed by its commercial rivals, each smartphone platform has an app store.
In a down market, most chief executives should have suffered under the model that was applied on the way up.
Under the model proposed in the budget papers, complaints will be handled by the commonwealth ombudsman and FOI appeals will go to the Administrative Appeals Tribunal.
He noted that, under the model that his institute is advocating and the one that states have adopted students can take the test as many times as needed.
Under the Model Penal Code and in most states, most crimes require a showing of "purposely," "knowingly," or "recklessly".
He noted that, under the model that his institute is advocating — and the one that states have adopted — students can take the test as many times as needed.
Under the model, an in-house mortgage broker deals directly with the banks and serves as a liaison between the buyer and the lending institution.
Under the model, pioneered by companies like Azuri Technologies, users pay a one-off installation fee of around $10 for a solar panel that can power two LED lights.
The guns, which sell under the model names Cricket and Chipmunk, were originally advertised on a "Kid's Corner" on the company's website (it has since been removed), which showed children firing them at rifle ranges and on hunting trips.
The docking affinity is shown under the model.
The situation is much complicated when algorithms are proposed directly under the model mentioned above.
