Last weekend, I started to migrate my old projects to the latest Android Studio. That is not a smooth process, first error I got is "Could not determine the class-path for interface com.android.builder.model.AndroidProject". I believe that caused by the old grade. I got a tip smart from Android Studio saying I should upgrade the version from 0.22 to 2.3.0. So I modified the classpath in the build.gradle file
classpath 'com.android.tools.build:gradle:2.3.0'
Then I still got the same error. After I did some research on the internet. I found to upgrade the gradle. I need to change gradle-wrapper.properties too.
distributionUrl=http://services.gradle.org/distributions/gradle-3.3-all.zip

That is to get the latest package.
Reference:https://stackoverflow.com/questions/42777321/could-not-determine-the-class-path-for-interface-com-android-builder-model-andro