Pricing, Performance & Features Comparison
GPT-5.3-Codex is OpenAI's most capable agentic coding model, combining frontier coding performance with the reasoning and professional knowledge capabilities of GPT-5.2 in a single model that is 25% faster than GPT-5.2-Codex. It is designed to handle long-running tasks involving research, tool use, and complex execution, enabling it to perform nearly any task a professional can do on a computer, from debugging and deployment to creating spreadsheets and presentations.
Kimi K2 is our latest Mixture-of-Experts model with 32 billion activated parameters and 1 trillion total parameters.