OpenAI’s new model leaps ahead in coding capabilities—but raises unprecedented cybersecurity risks

OpenAI believes it has finally pulled ahead in one of the most closely watched races in artificial intelligence: AI-powered coding. Its newest model, GPT-5.3-Codex, represents a solid advance over rival systems, showing markedly higher performance on coding benchmarks and reported results than earlier generations of both OpenAI’s and Anthropic’s models—suggesting a long-sought edge in a category that could reshape how software is built.

But the company is rolling out the model with...