We're updating Gemini managed agents with a new harness. antigravity-preview-09-2026 brings @​Antigravity tools and behavior to @​GoogleAIStudio and the Interactions API. It runs natively on Gemini 3.8 Flash, our best reasoning & coding model yet, and you can change your model selection anytime. Plus, we’re introducing two new APIs to make building easier and more secure 🧵 📷