GPT-5.2 Codex
Parameters
-
Context Length
400K
Modality
Text
Architecture
Dense
License
Proprietary
Release Date
13 Nov 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
GPT-5.2 Codex
Advanced coding-specialized model in GPT-5.2 series with superior software development capabilities. Outstanding coding performance (83.62 LiveBench Coding) and strong web development results (Elo 1401). Excels at complex programming tasks, algorithm design, code review, and technical documentation. Features optimized context handling for large-scale codebases and multi-file projects.
About GPT-5
OpenAI's latest generation of language models featuring advanced reasoning capabilities, extended context windows up to 400K tokens, and specialized variants for coding, general intelligence, and efficiency. GPT-5 series introduces improved thinking modes, superior performance across benchmarks, and variants optimized for different use cases from high-capacity Pro models to efficient Nano models. Features native multimodal understanding, enhanced mathematical reasoning, and state-of-the-art coding abilities through Codex variants.
Other GPT-5 Models
Evaluation Benchmarks
Rank
#13
| Benchmark | Score | Rank |
|---|---|---|
Coding LiveBench Coding | 0.84 | 🥇 1 |
Web Development WebDev Arena | 1401 | 7 |
Reasoning LiveBench Reasoning | 0.78 | 11 |
Mathematics LiveBench Mathematics | 0.75 | 18 |
Rankings
Overall Rank
#13
Coding Rank
#10