OpenAI’s GPT-5.3-Codex thinks deeper and wider about coding work

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, OpenAI's new agentic coding model, helped create itself

GPT-5.3 Codex merges the advanced coding capabilities of GPT-5.2 Codex with the reasoning and professional knowledge of GPT-5 ...

I used Xcode 26.3 to build an iOS app with my voice in just two days - and it was exhilarating

Want to see what agentic coding really feels like? Come along on my wild, wonderful, and terrifying two-day vibe coding adventure with Xcode 26.3.
eWeek

GPT-5.3-Codex: OpenAI Unveils a 25% Faster AI Model That Goes Beyond Coding

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

GPT-5.3-Codex Released as OpenAI’s First AI Model to Assist in Its Own Development

OpenAI’s GPT-5.3-Codex is 25 percent faster and requires less than half the tokens as its predecessor, 5.2-Codex.
PCMag

OpenAI's Newest GPT Model Helped to Build Itself

The new coding model is the first time the brand has found its own models can be instrumental in its own development.