Pydantic launches Agent Sandboxes in Logfire with millisecond cold starts on Rust interpreter Monty
samuelcolvin · x · 2026-11-12
Pydantic launches Agent Sandboxes in Logfire — a sandbox built differently from firecracker/gVisor/VM approaches: just an isolated interpreter with cold starts measured in milliseconds, where code can only call the tools you explicitly allow.
It's powered by Monty, Pydantic's open-source Rust interpreter, already used by fastmcp, AWS, Microsoft Agent Framework, Hugging Face's MCP server and more.
Related event: Pydantic Logfire Debuts Agent Sandboxes with Millisecond Cold Starts(3 posts)→
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