A few weeks ago, OpenAI CEO Sam Altman had already teased that o3-mini was coming soon, and earlier it was finally officially added to ChatGPT. Plus and Team users not only get 3 times the usage of o1-mini, but can also choose the better o3-mini-high. The free version can also use o3-mini with limitations. As for ChatGPT Pro, since you’re paying such an expensive subscription fee, of course it’s unlimited o3-mini usage. Below, we’ll show you how to enable it.
In addition to ChatGPT, the API is also open starting now.
o3-mini Introduction
o3-mini It is the newest and most cost-effective model in OpenAI’s reasoning series. Compared to o1-mini, it delivers superior performance in science, mathematics, and programming, while maintaining low cost and low latency, and it also supports search functionality.
OpenAI states that testers preferred o3-mini to o1-mini 56% of the time, and on difficult real-world problems, o3-mini also saw a 39% reduction in major errors.
They also shared some test data, such as in the AIME 2024 mathematics competition, where o3-mini-medium scored significantly higher than o1-mini, and o3-mini-high, available to Plus users, even surpassed the o1 model:
In PhD-level science problems, o3-mini-low already surpasses o1-mini by about 17.67%, and o3-mini-high goes even further to 32.83%, also surpassing the o1 model:
Across general knowledge, o3-mini also performs far better than o1-mini, especially o3-mini-high, which scores 13.8 on SimpleQA, a simple factuality question-answering benchmark—nearly double o1-mini’s 7.6.
o3-mini’s latency rate is also much lower than o1-mini:
How can the free version of ChatGPT use o3-mini?
This time, ChatGPT has also opened up o3-mini for free-tier users. However, unlike the previous way of switching models, it’s different: below the chat input box, turn on the Reason feature, and it will enable the o3-mini model:
When o3-mini replies, it will follow. DeepSeek Likewise, I’m making the thinking process public; those interested can open it to take a look:
As for whether the free version of ChatGPT’s o3-mini has daily limits, OpenAI hasn’t announced anything about that.
How can ChatGPT Plus users use o3-mini?
ChatGPT Plus, Team, and Pro users can use the o3-mini and o3-mini-High models the same way as before, by switching in the top-left menu. It’s available in both the desktop and web versions. If it doesn’t show up in your desktop version, close and reopen it.
Previously, the o1-mini limit was 50 messages per day, while the o3-mini increases that by 3 times to 150 messages per day, which should be more than enough for most people.
Source: KOCPC Chinese