
@davidspiff10 default reasoning level you see for the model when you run /model.
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Evan Boyle
1.3K posts

@_Evan_Boyle
Building the @GitHub Copilot CLI. Formerly @PulumiCorp, @AmazonAds, @Azure



We just shipped gpt-5.4-mini in the @github Copilot CLI today. I've found the model is surprisingly capable. The first prompt I try with every new model is "build me a snake game". Somehow gpt-5.4-mini produced my favorite version of any model so far.


















In January, we introduced GitHub Copilot SDKs for devs to bring the same agentic core that powers GitHub Copilot CLI, and embed into any tool and application. Today I'm super proud and excited to announce the Official GitHub Copilot SDK for #Java! 🚢Check it out at github.com/github/copilot… #JavaOne

