OpenAIReleased on Sep 15, 2025

GPT-5 Codex: Benchmarks, Pricing & Context Window

GPT-5 Codex is a language model from OpenAI, released in September 2025.

GPT-5 Codex has been trained specifically for conducting code reviews and finding critical flaws. When reviewing, it navigates your codebase and analyzes code patterns to identify potential security vulnerabilities, performance issues, and

GPT-5 Codex API

API access coming soon

GPT-5 Codex will be available through our gateway shortly.

GPT-5 Codex examples

Recent arena outputs from GPT-5 Codex, picked from the highest-ranked matchups.

GPT-5 Codex license

GPT-5 Codex is released under the Proprietary license, which restricts commercial use, has a knowledge cutoff of September 2024.

License
Proprietary
Non-commercial
Knowledge cutoff
September 2024

Proprietary license - usage restrictions apply

FAQ

Common questions about GPT-5 Codex.

When was GPT-5 Codex released?

GPT-5 Codex was released on September 15, 2025 by OpenAI. This is the official GPT-5 Codex release date tracked on LLM Stats.

Is GPT-5 Codex available via API?

Yes, GPT-5 Codex is available via API. See the official documentation for authentication and endpoint details.

Who created GPT-5 Codex?

GPT-5 Codex was created by OpenAI.

What is the license for GPT-5 Codex?

GPT-5 Codex is released under the Proprietary license.

What is the knowledge cutoff date for GPT-5 Codex?

GPT-5 Codex has a knowledge cutoff of September 2024, meaning it was trained on data up to that point and may not know about events after it.

Where is the GPT-5 Codex paper or technical report?

GPT-5 Codex has a paper or technical report available at https://openai.com/index/introducing-upgrades-to-codex/. Use that source for architecture, training, release and evaluation details.