Microsoft announced today that GPT-5.6 is now rolling out to Copilot experiences across Word, Excel, PowerPoint, Copilot Chat, and of course Copilot Cowork.
GPT‑5.6 is OpenAI’s latest flagship model series, which delivers more useful work from every token (and Copilot Credit), with stronger performance and on demand capability for the most complex tasks.
In their blog, Microsoft say that Copilot may automatically use GPT-5.6 when it’s best suited for the task at hand but where model selection is available for users (such as in a Chat and Cowork) , users will be able to choose GPT-5.6 directly from the model selector once available.
Open AI said in their blog that “GPT‑5.6 launches with our most robust safeguards to date, designed to be resilient against determined and adaptive misuse without broadly limiting legitimate work. Before general availability, we put the models and safeguards through our most extensive evaluation period yet, combining human red teaming with large-scale automated testing. During the preview, we worked closely with expert organizations and with trusted partners to pressure-test defenses and strengthen safeguards before broader launch. The resulting system layers protections trained into the model with real-time checks, monitoring, and access calibrated to trust and risk.”
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