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OpenAI Engineers Build Custom Windows Sandbox for Codex After Existing Security Tools Fall Short

OpenAI Engineers Build Custom Windows Sandbox for Codex After Existing Security Tools Fall Short

May 14, 2026
OpenAI

OpenAI engineers are building a custom Windows sandbox for their Codex coding agent after discovering that existing Windows security tools like AppContainer and Windows Sandbox fail to meet the strict isolation and flexibility demands of open-ended developer workflows, leading to a new elevated solution using dedicated local users, Windows Firewall …

Modal Slashes GPU Cold Start Times From 2,000 to 50 Seconds With Serverless Inference Breakthrough

Modal Slashes GPU Cold Start Times From 2,000 to 50 Seconds With Serverless Inference Breakthrough

May 13, 2026
Modal

Modal slashes GPU cold start times from over 2,000 seconds to just 50 seconds using a breakthrough combination of cloud-buffered idle GPUs, lazy-loading filesystems, CPU memory snapshotting, and CUDA checkpoint/restore, delivering 4-10x faster serverless inference for LLM workloads across hundreds of organizations.

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