OpenAI GPT-5.3 Challenges Anthropic’s Claude Opus

The competition in the AI industry is heating up this week. Anthropic recently launched its new AI model, Claude Opus 4.6, and almost immediately, it faced competition from OpenAI’s latest model, GPT-5.3 Codex.

OpenAI says that GPT-5.3 Codex is designed to handle much more complex tasks than previous AI models. It can not only write code but also solve problems, use tools, and work alongside humans in real time. This makes it useful for developers and professionals who need AI support for complicated projects.

Anthropic has made similar claims about Claude Opus 4.6, saying it also performs better on difficult and long-running tasks. This has set up a direct rivalry between the two companies, with both models competing to be the most advanced and helpful AI system available.

The launch of these models highlights how quickly AI technology is advancing and how companies are racing to provide smarter and more capable tools. For users, this means access to AI systems that can do more than ever before, from coding and problem-solving to assisting in professional work.