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GPT-5.6 is now the preferred model in Microsoft 365 Copilot

OpenAI Blog 9 July 2026, 13:00

Microsoft has made GPT-5.6 the default model in Microsoft 365 Copilot across its office applications. The model is now integrated into Word, Excel, PowerPoint, Chat, and Cowork. Users of these applications will experience faster processing and improved output quality for AI-assisted tasks.

Why it matters

Learn how GPT-5.6 powers Microsoft 365 Copilot with stronger AI capabilities across Word, Excel, PowerPoint, Chat, and Cowork for faster, higher-quality work.

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TLDRocket 21 July 2026

The open-weight AI model market hit an inflection point today as Alibaba and Kimi released trillion-parameter competitors that challenge the closed-model orthodoxy—just as Washington moved to restrict them. Alibaba's Qwen 3.8 Max (2.4 trillion parameters) and Kimi K3 (2.8T) are going open-weight, with K3 ranking first on Frontend Web App Arena and fourth on agentic benchmarks, signaling that scale and transparency can coexist. The timing matters: while U.S. policymakers weigh layered restrictions on Chinese open models, technical experts are pushing back hard, arguing that closed gardens actually hurt security and competition more than they help. The real fragmentation risk isn't technical—it's regulatory.

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GPT-5.6 is now the preferred model in Microsoft 365 Copilot

Why it matters

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