E2B vs Daytona vs Blaxel: AI Agent Code Execution Sandbox Comparison 2026
On April 15, 2026, OpenAI shipped Agents SDK v2 with seven native sandbox providers baked directly into the framework — Blaxel, Cloudflare, Daytona, E2B, Modal, Runloop, and Vercel. That single release turned sandbox selection from a niche infrastructure decision into a routine engineering choice that every AI agent team now has to make. Three providers dominate early conversations: E2B, Daytona, and Blaxel. Each is production-ready, each has native SDK integration, and each is built around a fundamentally different runtime model. This article breaks down exactly where they diverge, which workload profile each one is optimized for, and how to pick the right one without running a month of expensive benchmarks. ...