Modal Sandboxes are generally available

This post announces the general availability of Modal Sandboxes, a primitive for safely running untrusted code. It details the `exec` API for executing code in arbitrary languages, dynamic image configuration using the `Image` API, and filesystem snapshots for persistence. It highlights customer use cases like SWE-bench for agent benchmarks, Quora Poe for secure code execution, Codegen for large-scale refactors, and Relevance AI for AI workforce automation. Performance testing demonstrated sandbox creation throughput up to 1000 Sandboxes per second.