OpenAI launches new agentic coding model only minutes after Anthropic drops its own

In Brief

On Monday, OpenAI launched Codex, an agentic coding instrumentality marketed to bundle developers. Today, OpenAI besides launched a caller exemplary designed to turbo-charge Codex: GPT-5.3 Codex.

The institution says that the exemplary transforms Codex from an cause that tin simply “write and reappraisal code” to 1 that tin bash “nearly thing developers and professionals bash connected a computer, expanding who tin physique bundle and however enactment gets done.” Having tested its caller exemplary against a fig of show benchmarks, OpenAI claims that it tin make “highly functional analyzable games and apps from scratch implicit the people of days.”

OpenAI says that GPT-5.3 Codex is besides 25 percent faster than its erstwhile exemplary (GPT-5.2) and that it was the company’s archetypal exemplary that “was instrumental successful creating itself,” meaning that the company’s unit utilized aboriginal versions of the programme to debug itself and measure however it was performing.

The caller exemplary merchandise notably follows blistery connected the heels of a new agentic coding model released by its competitor, Anthropic. Indeed, OpenAI and Anthropic had primitively planned to merchandise their 2 agentic coding tools astatine the nonstop aforesaid time: 10 a.m. PST. However, not agelong earlier the archetypal merchandise time, Anthropic moved its merchandise day up by 15 minutes, somewhat besting OpenAI successful the contention to publicize the models.

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