Ai-Sandbox

The AI agent sandbox market crossed a critical threshold in 2026: enterprises stopped treating sandboxes as disposable compute and started treating them as stateful environments that need to persist across multi-day workflows. Blaxel was built for exactly that shift. It is a persistent AI agent sandbox platform whose headline metric is a 25ms resume time for paused environments — fast enough to make context switching between dozens of long-running agents practically invisible. If you are building autonomous coding agents, multi-step research pipelines, or browser automation agents that run for hours or days, Blaxel’s architecture is worth understanding before you commit to a simpler stateless sandbox. ...

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. ...