Microsoft 365 Copilot now runs GPT-5.6 as its default model across Word, Excel, and PowerPoint, deepening the OpenAI partnership with day-zero enterprise

The new AI agent is designed to automate workplace tasks, escalating OpenAI’s battle with Microsoft, Anthropic and Google for enterprise customers.

OpenAI launches ChatGPT Work alongside GPT-5.6 model family, enabling multi-step task execution across apps for Pro and Enterprise users.