Google Kills Project Mariner After 17 Months: How Browser Agents Lost the Architecture War to Code-Level AI
Google shut down Project Mariner on May 4, 2026, ending a 17-month experiment in browser-based AI agents that could navigate Chrome by taking screenshots and clicking buttons. The shutdown mirrors a broader pattern: OpenAI killed Operator in August 2025, and the agent market has decisively moved toward code-level tools like Claude Code and OpenClaw that skip the visual layer entirely. The browser agent era is over. The question now is what replaces it.