---
title: "GPT o3: The cutting edge of OpenAI experimental reasoning"
url: https://comunicagenia.com/en/blog/gpt-o3-the-cutting-edge-of-openai-experimental-rea/
date: 2026-10-09T19:16:43+00:00
modified: 2026-10-09T19:16:43+00:00
lang: en_US
---

# GPT o3: The cutting edge of OpenAI experimental reasoning

**OpenAI o3** is the next-generation reasoning model introduced by OpenAI in late December 2024, taking the cognitive capabilities of the "o" series to historic heights in science and software engineering.

## Evolution compared to the o1 generation

o3 outperforms o1 by 20% in complex coding problems and stands out for a denser and more structured chain of thought, minimizing hallucinations to practically zero levels in formal proofs of theorems and computer security analysis.

### Software Engineering

+20%

Direct improvement compared to o1 in refactoring and bug resolution tests.

### Science and Logic

Border

Assessments of abstract reasoning with solving unseen problems.

### Flexible Inference

Multilevel

Architecture designed to modulate the computing time according to the difficulty required.

For its optimized public access version, read our article on [o3-mini](https://comunicagenia.com/en/blog/o3-mini-reasoning-with-variable-computational-effo/) and expand the vision in our [OpenAI guide](https://comunicagenia.com/en/openai-models-features-and-pricing/).