Comment bien utiliser Google Antigravity – Tuto Complet

This summary explores Google Antigravity, a tool described as the most underrated artificial intelligence of 2026. This platform allows users to create websites and applications for free with remarkable flexibility. Its primary strength lies in its ability to connect with other AI models, significantly expanding its capabilities. This guide focuses on how to navigate the interface, utilize its autonomous features, and integrate advanced tools to build high-quality digital products that meet specific professional expectations. The interface is divided into two main components: the Agent Manager and the Editor. The Agent Manager functions similarly to established AI chats like Gemini or ChatGPT. It is designed for brainstorming, refining ideas, and creating initial project drafts. Users can work within local folders on their computers to centralize information or use a temporary "Playground" for unsaved sessions. The Editor, however, is where the actual development of websites and applications takes place. When starting a project, users must choose between two processing modes: Fast and Planning. The Fast mode is suitable for simple websites, while the Planning mode triggers a complex "chain of thought" process. In Planning mode, the AI conducts deep reasoning to produce premium, highly functional applications. Users also have access to various AI models, including Google’s Gemini 3.1 Pro and Flash, or Anthropic’s Claude 3.5 Sonnet and Opus 4. While Gemini Flash is often sufficient for standard websites, more complex projects benefit from the higher-tier models. A practical demonstration involving a "Connected Bakery" startup illustrates the tool's power. By providing a simple prompt for a site that allows customers to order custom bread based on their health data, the AI activates several autonomous agents. It uses a Model Context Protocol (MCP) called Stitch and an image generator known as Nano Banana 2. The AI autonomously generates professional logos, high-quality visuals with accurate text, and persuasive marketing slogans. Beyond visual creation, the tool opens a browser to test the site's functionality, ensuring the design and user flow are optimized before delivery. To access these features, users visit antigravity.google, download the version compatible with their operating system (Mac or Windows), and log in with a Gmail account. While there are usage quotas for free accounts, Google Workspace or Gemini users typically have sufficient tokens for extensive development. For professional-grade results, the Editor settings must be configured carefully. It is recommended that beginners set the "Request Review" option to "Always." This ensures the AI asks for permission before modifying files or opening applications. For experienced users, the "Always Proceed" mode allows the AI to work autonomously, though this carries risks as the tool can control the mouse, keyboard, and file system. Enabling "Browser Tools" is essential, as it allows the AI to surf the web for information and conduct live testing of the applications it builds. Advanced customization is another pillar of Google Antigravity. Users can define "Rules," which act as custom instructions for the AI’s behavior, and "Workflows," which are shortcuts for specific actions like auditing a competitor's website. The tool also supports MCP Servers, acting as a bridge to external services like GitHub, Figma, Airtable, and N8N. These connections allow the AI to push code directly to GitHub, enabling seamless deployment through platforms like Vercel. In a more complex development scenario using Planning mode, the AI does not just write code; it establishes a comprehensive roadmap. For the bakery application, the AI autonomously handled the creation of a health-goal configurator, ingredient selection logic, and a full e-commerce checkout flow. It researched nutritional data, calculated pricing based on ingredients, and set up delivery time slots. Throughout this process, the AI took control of the computer to validate every form and user path, simulating real-world usage on both mobile and desktop views. Furthermore, the platform supports extensions, most notably "Claude Code." By installing this extension and linking a paid Claude account, users can chat directly with the Claude model within the Antigravity interface to audit their code or brainstorm improvements. Another complementary tool is Stitch, a Google service for creating high-end mockups. When Stitch is connected to Antigravity via an MCP, users can generate sophisticated design templates that the AI then develops into functional code, significantly improving the user experience and design quality. In conclusion, Google Antigravity represents a significant leap in autonomous AI development. By combining strategic planning, autonomous browser testing, and a vast ecosystem of integrations, it allows both beginners and professionals to move from a basic idea to a fully deployed, tested application with minimal manual intervention. The integration of image generation, logical reasoning, and deployment workflows makes it a comprehensive solution for modern digital creation.