Home
Catalogs
Models 4,400
GPT 5.3 Codex GPT-5.3-Codex is OpenAI’s most capable agentic coding model, combining… Open

GPT 5.3 Codex

GPT-5.3-Codex is OpenAI’s most capable agentic coding model, combining GPT-5.2-Codex’s frontier coding with GPT-5.2’s reasoning in one model that is ~25% faster, tops SWE-Bench Pro and Terminal-Bench, and runs long, tool-using workflows on a computer.

OpenAI Coding Closed

Visit model website ↗

Type: Coding
Weights: Closed

Related tools

4

ChatGPT Codex ✓

A cloud-based software engineering agent for codebase questions.

Source rating 5.0 Free + from $20 USD / month 1.2k views 17 saves

Coding

Trovance AI ✓

The growth engine for the agentic web.

Source rating 5.0 Trial; then from $99/mo 432 views 4 saves

YappJam ✓

Multiplayer vibe coding

Source rating 5.0 Free + from $36.00/mo 1.7k views 7 saves

Collaborative coding

LettsGroup ✓

The AI that builds your entire business.

Free + from $25.8/mo 224 views 1 saves

Venture building

More from OpenAI

14

About OpenAI

1

OpenAI develops and deploys general-purpose artificial intelligence models, products, and developer platforms.

openai.com

Benchmark scores

5

How GPT 5.3 Codex ranks on tracked AI benchmarks. Click any benchmark to see its full leaderboard.

Tools using GPT 5.3 Codex

24