GPT-5.3 Codex merges the advanced coding capabilities of GPT-5.2 Codex with the reasoning and professional knowledge of GPT-5 ...
OpenAI’s GPT-5.3-Codex expands Codex into a full agentic system, delivering faster performance, top benchmarks, and advanced cybersecurity capabilities.
I pushed eight free AI chatbots to their limits to find the best AI chatbots of 2026. To explore our top picks, check out ZDNET's chatbot-by-chatbot guide.
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