GPT-5.6

GitHub Copilot Adds OpenAI’s GPT-5.6 Sol, Terra, and Luna Models

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GitHub Copilot Adds OpenAI's GPT-5.6 Sol, Terra, and Luna Models

Millions of developers open GitHub Copilot every day without thinking much about which AI model is actually answering them. That changed again this week. On July 9, 2026, GitHub confirmed that OpenAI’s GPT-5.6 family — three separate models named Sol, Terra, and Luna — is now available inside Copilot, giving developers an explicit choice between … Read more

OpenAI GPT-5.6 Explained: Sol, Terra, and Luna — What the Model Family Means for Developers

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OpenAI GPT-5.6 Explained: Sol, Terra, and Luna — What the Model Family Means for Developers

Introduction On June 26, 2026, OpenAI announced three new models — Sol, Terra, and Luna — under the GPT-5.6 family. The announcement is significant not because it follows a new model release, but because of what it reveals about where AI model development is heading: deliberate product differentiation by capability tier, active government involvement in … Read more