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.

The enterprise AI agent combines ChatGPT, Codex, and GPT-5.6 to automate workplace tasks as OpenAI broadens rollout of its latest frontier models.

OpenAI reaffirmed GPT 5.6 as the top choice for Microsoft Copilot 365, following reports of Microsoft integrating its in-house MAI models to reduce operational costs.

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

Microsoft is pivoting back to its primary partner OpenAI with a day-one integration of GPT-5.6 model series to supercharge Word, Excel, and PowerPoint.