OpenAI has introduced GPT-5.3-Codex, a new generation of its Codex coding system that did more than write software for others, it helped build itself. The company describes this 5.3 family model as a ...

On Thursday, OpenAI released GPT-5.3-Codex, a new model that extends its Codex coding agent beyond writing and reviewing code to performing a much wider range of work tasks. The release comes as ...

Is GPT-5.3 Codex the fantastic option developers have been waiting for? With its lightning-fast execution, a staggering 400K token context window, and unparalleled efficiency, OpenAI’s latest model is ...

OpenAI is pitching GPT-5.3-Codex as a long-running “agent,” not just a code helper: The company says the model combines GPT-5.2-Codex coding strength with GPT-5.2 reasoning and professional knowledge, ...

OpenAI has launched GPT-5.3-Codex, a high-performance agentic model that sets new records across major coding benchmarks. Today, OpenAI announced GPT-5.3-Codex, its most capable agentic coding model ...

GPT-5.3-Codex jumped to No. 1 in Quality on Microsoft Foundry shortly after release, edging other frontier models by a slim 0.94-0.93 margin. Using a podium score across Quality, Safety, Cost, and ...