ChatGPT 5.0 (GPT-5): Capabilities, Uses, and Research Directions Abstract OpenAI’s GPT-5—now powering ChatGPT 5.0—marks a substantive step in large-scale, general-purpose reasoning systems. Beyond incremental accuracy gains, GPT-5 integrates “built-in thinking,” faster tool use, and agentic workflows that broaden real-world applicability across research, software, and operations. This article reviews what is known from primary releases, situates GPT-5 in the trajectory of LLM development, and outlines implications for enterprise adoption, safety, and future research. 1. Release overview and positioning OpenAI describes GPT-5 as its “smartest, fastest, most useful model yet,” available in ChatGPT and via API, with rollouts to Team/Enterprise/Edu and a Pro variant emphasising extended reasoning. These materials frame GPT-5 as a platform model intended to sit at the centre of knowledge work. ( OpenAI ) For developers, OpenAI highlights GPT-5 as “our best model yet for coding and ag...