Pydantic team open-sources Monty: a Python sandbox that starts in 1ms
samuelcolvin · x · 2026-09-25
samuelcolvin (Pydantic) released Monty v1, an open-source Python sandbox that starts in 1 millisecond instead of 1.5 seconds. He ran 10k sandboxed scripts in 674ms — a cloud sandbox would take over 3 hours.
- Removes the biggest drawback of letting agents write code
- Supports long-lived sessions: dump and resume at any external function call
- Open source, installable via PyPI, npm, or Crates
- A hosted platform is coming; design partners being sought
Related event: Pydantic Creator Open-Sources Monty, a Python Sandbox with 1ms Startup(5 posts)→
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