Pydantic Logfire launches Agent Sandboxes with millisecond cold starts and snapshot resume
samuelcolvin · x · 2026-11-12
Pydantic Logfire has launched Agent Sandboxes, pitched as a fundamentally different take on sandboxes: instead of firecracker/gVisor/VM infrastructure, it's an isolated interpreter with millisecond-level cold starts, where sandboxed code can only call tools you explicitly provide and touch directories you mount.
Key features:
- Designed for programmatic tool calling in AI agents
- Snapshot and resume a REPL weeks later, with snapshots costing virtually nothing
- Free tier with $1,000 of free credit in the first month
Related event: Pydantic Logfire Debuts Agent Sandboxes with Millisecond Cold Starts(3 posts)→
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