Skip to content
IFAI

GPT-5.3-Codex

Product2 stories

  1. AI modelsReach 51

    OpenAI opens up GPT-5.3-Codex to all developers

    OpenAI just made its specialized coding model, GPT-5.3-Codex, available to all developers through the Responses API. The model combines frontier coding performance with deep professional knowledge in a single package. It basically gives builders immediate programmatic access to integrate its top-tier code generation directly into their own apps.

  2. AI modelsReach 54

    OpenAI introduces GPT-5.3-Codex: 25% faster and helped build itself

    OpenAI just launched GPT-5.3-Codex, an agentic model that is 25% faster and sets high marks on SWE-Bench Pro. Remarkably, the Codex team used early versions of the model to debug its own training run and manage deployment. It turns coding into an interactive, real-time collaboration that spans the entire software lifecycle.