o3
Parameters
-
Context Length
128K
Modality
Text
Architecture
Dense
License
Proprietary
Release Date
20 Dec 2025
Knowledge Cutoff
-
Technical Specifications
Attention Structure
Multi-Head Attention
Hidden Dimension Size
-
Number of Layers
-
Attention Heads
-
Key-Value Heads
-
Activation Function
-
Normalization
-
Position Embedding
Absolute Position Embedding
o3
o3 provides advanced reasoning capabilities for complex problem-solving across multiple domains. Features deliberative thinking for mathematics, coding, and analytical tasks. Achieves strong performance on challenging benchmarks including competitive programming, advanced mathematics, and scientific reasoning. Well-suited for applications requiring careful analysis and multi-step reasoning at a balanced cost-performance ratio.
About o3
OpenAI's o3 reasoning models represent a breakthrough in deliberative problem-solving and mathematical reasoning. These models use advanced chain-of-thought techniques and can be configured with different compute levels (low, medium, high) to balance reasoning depth with response time. Excel at complex mathematics, scientific reasoning, and multi-step problem solving.
Other o3 Models
- No related models available
Evaluation Benchmarks
Rank
#26
| Benchmark | Score | Rank |
|---|---|---|
QA Assistant ProLLM QA Assistant | 0.99 | 🥇 1 |
Coding Aider Coding | 0.81 | ⭐ 4 |
Professional Knowledge MMLU Pro | 0.86 | 14 |
Graduate-Level QA GPQA | 0.83 | 17 |
Rankings
Overall Rank
#26
Coding Rank
#28