OpenAI has rolled out GPT-5.3-Codex, its most advanced agentic coding model yet. It merges frontier coding strengths from GPT-5.2-Codex with improved reasoning and professional knowledge from GPT-5.2, all in one system that runs 25 percent faster. The model handles extended workflows involving research, tool use and complex execution while allowing users to interact a…OpenAI has rolled out GPT-5.3-Codex, its most advanced agentic coding model yet. It merges frontier coding strengths from GPT-5.2-Codex with improved reasoning and professional knowledge from GPT-5.2, all in one system that runs 25 percent faster. The model handles extended workflows involving research, tool use and complex execution while allowing users to interact a…
