Prime Intellect open-sources Prime Sandboxes: microVMs purpose-built for agentic RL training

niloofar_mire · x · 2026-09-24

Prime Intellect launched Prime Sandboxes, microVM sandboxes purpose-built for large-scale agentic RL training, now available publicly.

The team couldn't find sandboxes that could handle the scale of their RL training — model training requires running tens of thousands of concurrent sandboxes, leading to complex and costly configuration — so they built their own and are releasing it.

Related event: Prime Intellect Open-Sources Prime Sandboxes, MicroVM Sandboxes for RL Training(5 posts)→

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