Sora 1 is slightly more expensive than Veo 3, at $0.50/second: https://azure.microsoft.com/en-us/pricing/details/cognitive-... (select "US East 2" as region; not all regions have Sora).

Though again, caveat: Those are API prices. The real prices could be both lower (if there is a profit margin) or higher (if they are subsidized).