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ChatGPT in 2026: GPT-5 Architecture, Agentic Workflows & Enterprise Impact

As of January 2026, ChatGPT has evolved from a sophisticated chatbot into a comprehensive AI Operating System for work and daily life. With the release of GPT-5 and the advanced o3-pro reasoning models, OpenAI has fundamentally shifted the landscape of Generative AI, moving beyond simple text prediction to complex, multi-step problem solving and autonomous agentic workflows. Evolution of the Model…