GPT-5.6 Sol Is Now in Foundry — What It Means If You Write C#
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Microsoft has a habit of quietly upgrading the model behind a stable endpoint name instead of forcing everyone to migrate to a new one. That's exactly what just happened with GPT-chat-latest — it's now built on GPT-5.6 Sol, and if you're already pointing at GPT-chat-latest in Microsoft Foundry, you get the upgrade without touching a line of code. If you're not already using it, this is a good moment to start. Here's what changed, why it matters, and — because I don't do AI posts without somethi