GPT-5 (OpenAI)

OpenAI's GPT-5 marks a shift from specialized models toward a single unified system that combines advanced reasoning, multimodal input, and task execution. Released on August 7, 2025, it was positioned as OpenAI's flagship AI system, with Microsoft incorporating it into consumer, developer, and enterprise offerings such as Microsoft 365 Copilot and Microsoft Copilot on the same day. Microsoft's integration announcement emphasized that GPT-5 brings new reasoning capabilities and improvements to coding alongside fast, creative responses for everyday use, suggesting a design that can route between deeper deliberation and lighter interactions depending on the task.

GPT-5 is intended for complex, multi-step workflows where users previously had to coordinate separate reasoning and chat models, consolidating those capabilities behind one interface. Third-party coverage describes the family as comprising several variants, including gpt-5, gpt-5-mini, gpt-5-nano, and gpt-5-chat, giving developers options that trade capability against latency or cost. Practical fit centers on tasks that benefit from sustained reasoning, such as extended coding sessions and structured problem solving, while still supporting routine conversational use within ChatGPT and integrated Microsoft products.