o1 Pro

Yeah. I've found out that you can start out with o3-mini-high and then switch over to o1-pro, or the other way around. Helps to iterate a bit faster.

I think o1 pro runs multiple instances of o1 in parallel and selects the best answer, or something of the sort. And you do actually always pay for thinking models with all providers, OpenAI included. It's especially interesting if you remember the fact that OpenAI hides the CoT from you, so you're in fact getting billed for "thinking" that you can't even read yourself.

Missing o1 and o1 Pro Mode which were huge leaps as I remember it too. That's when I started being able to basically generate some blackbox functions where I understand the input and outputs myself, but not the internals of the functions, particularly for math-heavy stuff within gamedev. Before o1 it was kind of a hit and miss in most cases.

Sorry, since the Platform UI featured it as an option, I figured OpenAI might enable o1-Pro via the chat completions endpoint, I just got around to testing it, and I also get the same 404 `invalid_request_error` error via the platform UI and API. It's such an odd and old 404 message, to suggest using the old completions API! It's hard to believe it could be an intentional design decision. Maybe they see it as an important feature to avoid wasting (and refunding) o1-pro credit. I noticed that their platform's dashboard queries https://api.openai.com/dashboard/which lists a supported_methods property of models. I can't see anything similar in the huge https://raw.githubusercontent.com/openai/openai-openapi/refs... schema yet (commit ec54f88 right now), and it lacks mention of o1-pro at all. Like the whole developer messages thing, the UX of the API seems like such an after-thought.