as per the url : http://apigee.com/docs/release-notes/content/15091100-apigee-developer-services-portal-release-notes, new portal has released.
How we would identify our portal version, its old or updated one?
@Vishal Bhatnagar Make a call to <portal_base_url>/buildInfo
You can see an example here; http://dev-pixvy.devportal.apigee.com/buildInfo
+ If you have pantheon access (which for a production cloud hosted portal you can) you will be able to see all the latest code releases which you need to apply to your instance of dev portal