Aleph Alpha documents RL sandbox infrastructure lessons: stalled GPUs, full disks, crash-as-wrong-answer bugs
_ScottCondron · x · 2026-10-23
Aleph Alpha published lessons from building Kolibri, its RL environment/sandbox infrastructure: stalled GPUs, images filling disks, crashed sandboxes scored as wrong answers, and reward hacks. The key framing: sandboxes aren't just for cloud agents — research runs thousands of concurrent sandboxes per run, and balancing throughput with the trainer is the hard part.
The retweeter notes similar massive sandbox volume in research and links CoreWeave Sandboxes, which offers hardware-isolated microVMs, cluster-level policy enforcement, and co-location with training/inference. Directly useful for teams building RL/agent infrastructure.
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