Afaik, there is currently no "GPT-5 Pro". Did you mean o3-pro or o1-pro (via API)?

Currently, GPT-5 sits at $10/1M output tokens, o3-pro at $80, and o1-pro at a whopping $600: https://platform.openai.com/docs/pricing

Of course this is not indicative of actual performance or quality per $ spent, but according to my own testing, their performance does seem to scale in line with their cost.

▲

mastercheif 3 days ago | parent | next [-]

GPT-5 Pro is only available on ChatGPT with a ChatGPT Pro subscription.

Supposedly it fires off multiple parallel thinking chains and then essentially debates with itself to net a final answer.

▲

yzydserd 3 days ago | parent | prev [-]

O5-pro is available through the ChatGPT UI with a “Pro” plan. I understand that like o3 pro it is a high compute large context invocation of underlying models.

	▲	rbinv 3 days ago \| parent [-]
		Thanks, I was not aware! I thought they offered all their models via their API.