Creator tier (lowest tier that's full service) is $22/mo for 250 minutes, $0.08/minute. Then it's $0.15/1000 characters. (So many different fucking units! And these prices are actually "credits" translated to other units; I fucking hate funny-money "credits")
https://platform.openai.com/docs/pricing#transcription-and-s...
Estimated $0.015/minute (actually priced based on tokens; yet more weird units!)
The non-instruction models are $0.015/1000 characters.
It starts getting more competitive when you are at the highest tier at ElevenLabs ($1320/month), but because of their pricing structure I'm not going to invest the time in finding out if it's worth it.