There's a spectrum, and all news outlets will have incorrect information published from time to time, be it bad sources or bad reporting. Humans are involved, after all.

You'd also have to decide whether you include Fox/CNN/MSNBC's opinion segments in the evaluation, or just the news sections. (Fox and MSNBC are especially screwed in this evaluation if you include the opinion hours.) After that, decide if "technically true but highly misleading" counts as factual or not.

The NY Post has a long history of being sensationalist and misleading - there's a reason it's considered a tabloid.

So is the NY Post the only tabloid in the world? What about the Sun in the UK? Daily mirror? I think based on your requirements all those should be fact checked 100% of the time and blocked when incorrect information is posted right? Or should it only be when it damages the preferred political candidate?

I'm not aware of having expressed any "requirements" here.

I simply find "the NY Post is a less credible organization than the AP" to be a very sustainable opinion.