Pydantic Releases Monty Sandboxed Python Subset

On Feb. 6, 2026, Pydantic released Monty, a Rust-implemented subset of Python provided as a Rust library and a Python package, with WebAssembly builds for browser use. Monty runs a constrained Python-like language to safely execute LLM-generated code with microsecond startup, blocking filesystem, environment and network access while exposing only developer-controlled host calls. The project includes a Pyodide wheel and standalone WASM demos demonstrating sandboxed execution and low latency.