o1 is OpenAI's answer to "what if we made an AI that actually thinks before responding?" Unlike GPT-4o which spits out answers faster than you can blink, o1 sits there pondering life for 2-3 minutes before giving you a response. This "chain-of-thought" reasoning is hidden from you (because OpenAI says so), but the results speak for themselves - if you can afford the $60 per million output tokens.
The Real Cost of "Reasoning"
Let me put this in perspective: a typical o1 query costs 5-10 cents. That doesn't sound like much until you're debugging at 3am and realize you've burned through $50 asking it to explain your broken state management. GPT-4o costs pennies per query. Do the math.
I learned this the hard way when I burned through $200 in API credits testing o1 on a complex TypeScript refactor. The model kept "thinking" about each query while my credit balance evaporated faster than my patience. Other developers report similar cost shock - one forgot to switch back from o1 and ended up with an $847 weekend bill.
Performance That Actually Matters
OpenAI o1 achieves 89th percentile performance on competitive programming vs GPT-4o's 11th percentile
Here's the thing - o1 legitimately kicks ass at complex problems. According to OpenAI's competitive programming assessments, it ranked 89th percentile while GPT-4o was stuck at 11th percentile. It's the first AI to beat PhD experts on graduate-level science questions. Independent research confirms it often achieves human-level or superior performance across complex reasoning tasks.
But before you get excited, remember that your simple "help me write a CRUD API" doesn't need PhD-level reasoning. Performance analysis shows that for most developer tasks, you're paying 4x more for capabilities you don't need. Save o1 for the hard stuff unless you enjoy watching money disappear.
The Black Box Problem
OpenAI's system card admits they hide the reasoning chain from users. When o1 gives you a wrong answer after 3 minutes of "thinking," you're fucked for debugging. With GPT-4o, you can at least see the immediate response pattern. With o1, you're supposed to trust that all that hidden pondering led to the right conclusion.
Model Variants (Pick Your Poison)
- o1-preview: The original "expensive and slow" option at $60 per million output tokens
- o1-mini: 80% cheaper than o1-preview but still way more expensive than GPT-4o
- o1-pro: The 2025 "are you fucking insane?" option at $600 per million output tokens - 10x more than standard o1
All three will make you question whether you really need an AI that thinks this hard about your problems. Azure pricing shows similar cost structures, and API access requires tier-based permissions that can limit your usage even further. The o1-pro model is accessible through ChatGPT Pro's $200/month subscription for those who want to burn money faster.