Varies. Not all of them are equal. At least not in the same way. Distinctions are important. NYT, for example, employs Farnaz Fassihi who's a known regime shill. CNN recently sent a reporter live to the region who has to operate under the regime's restrictions to be let in and cannot accurately report everything even if they wanted to. Same with Reuters who has an office inside. They basically had a choice to bite the bullet and agree to the terms and be one of the few foreign reporters with access, or not have access at all and freely report.

That said, PressTV is different from the above a it's an officially a state-operated entity, so it is not a question of mere bias.