Microsoft 365 Copilot prioritises new GPT-5.6 models
Microsoft 365 Copilot now utilises OpenAI's new GPT-5.6 model series as its primary engine, including GPT-5.6 Sol, Terra, and Luna, following a period where Anthropic models were employed for specific tasks.
What happened?
OpenAI has launched its GPT-5.6 model series, comprising GPT-5.6 Sol, GPT-5.6 Terra, and GPT-5.6 Luna. GPT-5.6 Sol serves as the flagship model, Terra provides a balance between performance and cost, and Luna is the most cost-effective variant. Microsoft has announced that these GPT-5.6 models are available in Microsoft 365 Copilot from day one.
Key facts
| Modellserien lanseras | GPT-5.6 (Sol, Terra, Luna) |
|---|---|
| Microsoft 365 Copilot integration | Dag ett-tillgänglighet |
| Användningsområden | Word, Excel, PowerPoint, Chat |
”Yesterday, OpenAI announced the public rollout of its GPT-5.6 model series, which includes GPT-5.6 Sol, GPT-5.6 Terra, and GPT-5.6 Luna. As with several previous OpenAI model launches, Microsoft also announced day-one availability of the GPT-5.6 models in Microsoft 365 Copilot.”
Why it matters
While Microsoft 365 Copilot has historically used OpenAI models, it has implemented Anthropic models over the past year for specific complex scenarios where they offered superior performance. With the launch of GPT-5.6, OpenAI's models have reached a performance level that makes them the preferred choice again, particularly due to architectural improvements and cost-efficiency. This move highlights the ongoing competition between AI developers and the drive for optimised performance in enterprise applications.
Who is affected?
Microsoft 365 Copilot users are the primary group affected, gaining access to the latest GPT-5.6 models for text generation and other AI-driven features in applications such as Word, Excel, and PowerPoint. Developers and enterprises relying on AI integrations may also benefit from the improved models, while OpenAI and Anthropic continue to compete for market share. Companies invested in the Microsoft ecosystem can expect enhancements in AI-assisted workflows.
Impact on the EU
Microsoft 365 Copilot is available to users within the EU, meaning European companies and individuals will have access to the new GPT-5.6 models. The availability of these advanced AI models is subject to the EU's forthcoming AI Act, which mandates transparency and safety requirements for AI systems.
What else you should know
The shift to GPT-5.6 as the preferred model highlights the rapid evolution of the AI sector and the need for companies to continuously adapt to new, more efficient models. It also underscores the importance of cost-efficiency when selecting AI models for large-scale deployments.
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