Rather than GPT-5, OpenAI has discreetly introduced the 'o3-pro'.

Let's delve into this o3-pro, heralded as the 'most powerful AI model'. What sets it apart? Who is it tailored for?

1. What is o3-pro?

In essence, o3-pro is an enhanced iteration of the o3 reasoning model. Officially, it is touted as the most proficient in reasoning thus far.

Specifically designed for intricate challenges, o3-pro prioritizes clarity of thought over speed. For tasks encompassing mathematics, science, programming, writing, and education, it offers more methodical, precise, and structured outputs.

2. Impressive Performance

Let's begin with the performance metrics.

In expert evaluations, o3-pro garnered more acclaim than its predecessor, o3.

In OpenAI's internal tests, o3-pro exhibited remarkable results:

- In the mathematics test AIME 2024, it surpassed Google's Gemini 2.5 Pro.

- In the GPQA Diamond (a doctoral-level scientific knowledge assessment), it outperformed Anthropic's Claude 4 Opus.

- In the programming test Codeforces, it showed significant improvements over previous models.

These tests emphasize logical rigor and depth of knowledge, underscoring OpenAI's advancements in reasoning capability.

Additionally, OpenAI employed a '4/4 reliability assessment' to validate o3-pro's dependability (success is only achieved when all four answers are correct).

3. Pricing Structure

Considering the API call prices:

- Input: $20 per million tokens

- Output: $80 per million tokens

Compared to the standard o3, the price is ten times higher...

4. Limitations of Even the Best

No model is flawless, regardless of its prowess.

OpenAI has acknowledged some current limitations of o3-pro:

- Slower than previous generations, with longer output times;

- Currently does not support image generation;

- Temporarily incompatible with Canvas functionality;

- Cannot utilize the 'ephemeral chat' feature in ChatGPT.

However, these issues minimally impact most text-based applications. If you prioritize depth and accuracy, you'll have to embrace the slower pace for superior quality.

Currently, o3-pro is accessible to ChatGPT Pro and Team users, with enterprise and education users gaining access next week.

If you demand high quality and accuracy in AI responses for your daily tasks, o3-pro is worth exploring.