Dan tested Codex 5.3 on Proof, a macOS markdown editor that he's been vibe coding that tracks the origin of every piece of text—whether it was written by a human or generated by AI—and lets users ...

The new model is build to accelerate the capabilities of Codex, the agentic coding tool OpenAI launched earlier this week.

Today, OpenAI announced GPT-5.3-Codex, a new version of its frontier coding model that will be available via the command line ...

OpenAI and Anthropic, the startups behind ChatGPT and Claude, are gearing up for a major showdown. Both need to prove they ...

The new coding model released Thursday afternoon, entitled GPT-5.3-Codex, builds on OpenAI’s GPT-5.2-Codex model and combines insights from the AI company’s GPT-5.2 model, which excels on non-coding ...

OpenAI launched GPT-5.3-Codex as Anthropic released Claude Opus 4.6 in a simultaneous drop that kicks off the AI coding wars, ...

A long-simmering rivalry between two of the world’s biggest AI companies was on public display this week as Anthropic and OpenAI took swings at one another online.

Meyer: Curriculum quality, teacher training and evidence-based instruction are harder and slower than a font swap — and much ...