Building the agentic future: Developer highlights from I/O 2026

Source: Google Date: 2026-05-19 URL: https://blog.google/innovation-and-ai/technology/developers-tools/google-io-2026-developer-highlights/

Summary

Google rebrands its developer agent platform as “Google Antigravity” — replacing Gemini CLI with Antigravity CLI, plus a standalone desktop app (Antigravity 2.0) and SDK. Managed Agents in Gemini API: single API call enables agents that reason, use tools, and execute code in isolated Linux environments, powered by Antigravity harness + Gemini 3.5 Flash. Google AI Studio gains mobile app, Android development support, Workspace API integration, Google Play Console for direct publishing, and project export to Antigravity. AI Ultra $100/month tier with 5x usage limits confirmed.

Implications

• Antigravity CLI replaces Gemini CLI — migration encouraged. The tracked dependency needs renaming. The SubagentProtocol infrastructure staged in v0.43.0-preview now has a product wrapper.
• Managed Agents via single API call competes directly with Anthropic’s Managed Agents (announced Code with Claude, May 6). Both offer isolated execution environments. Google bundles the model (3.5 Flash); Anthropic lets you choose.
• AI Ultra at $100/month fills the gap between Pro ($20) and Ultra ($250), confirming the leaked “Neon” tier. Three-tier consumer ladder now live.
• Google AI Studio → Antigravity export preserves context — the context portability thread gets a concrete implementation from Google’s side.