Modal sandboxes scale past 100,000 concurrent environments

RL workloads are turning isolated container orchestration into a million-environment systems problem

Sandboxes started as a weekend prototype at Modal. Now they're handling 100,000+ concurrent environments for RL workloads, with customers targeting 1 million. How do you orchestrate that many isolated containers?

Ranked #28 on backlist 2026-06-08 (08 Jun 2026 UTC) · by @AmplifyPartners (Amplify Partners) · view on X ↗

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