OpenAI’s o1-pro is the company’s most expensive AI model yet

OpenAI has launched a more powerful version of its o1 “reasoning” AI model, o1-pro, in its developer API.

According to OpenAI, o1-pro uses more computing than o1 to provide “consistently better responses.” Currently, it’s only available to select developers — those who’ve spent at least $5 on OpenAI API services — and it’s pricey. Very pricey.

OpenAI is charging $150 per million tokens (~750,000 words) fed into the model and $600 per million tokens generated by the model. That’s twice the price of OpenAI’s GPT-4.5 for input and 10x the price of regular o1.

OpenAI is betting that o1-pro’s improved performance will convince developers to pay those princely sums.

“O1-pro in the API is a version of o1 that uses more computing to think harder and provide even better answers to the hardest problems,” an OpenAI spokesperson told TechCrunch. “After getting many requests from our developer community, we’re excited to bring it to the API to offer even more reliable responses.”

Yet early impressions of o1-pro, which has been available in OpenAI’s AI-powered chatbot platform ChatGPT for ChatGPT Pro subscribers since December, weren’t incredibly positive. O1—pro struggled with Sudoku puzzles, users found, and was tripped up by simple optical illusion jokes.

Furthermore, certain OpenAI internal benchmarks from late last year showed that o1-pro performed only slightly better than the standard o1 on coding and math problems.