OpenAI’s GPT-5.3-Codex expands Codex into a full agentic system, delivering faster performance, top benchmarks, and advanced cybersecurity capabilities.

The company says its latest model’s agentic skills also apply to a broader set of knowledge work such as presentations and ...

GPT‑5.3‑Codex, its new coding and development model, is apparently the first “that was instrumental in creating itself.” No, that probably doesn’t mean ChatGPT is ready to build its own Skynet, but it ...

Anthropic's Claude Opus 4.6 and OpenAI's GPT-5.3-Codex go head-to-head in agentic coding, but are there any differences?

GPT-5.3-Codex is the first time the ChatGPT maker has found that its own models can be instrumental in its own development.