Server Side Code Execution Tools For Ai Agents Compared

Where model-written code runs is a security, latency and cost decision, and OpenRouter's new comparison lays out the hosted options side by side. It covers server-side code execution from OpenAI, Anthropic, Google and OpenRouter itself. The axes are the ones that bite in production: how each sandbox is isolated, whether state persists between requests, what network access is allowed by default, and how per-second pricing adds up. The piece also describes cases where operating your own sandbox is the better choice rather than renting one from a model provider. Readers should keep in mind that OpenRouter is a vendor in this comparison, so its own product is one of the four entries. Even so, the framing is useful as a checklist. Before an agent runs generated code against real data, a team should know whether the sandbox keeps files between calls, whether it can reach the internet without being told to, and how billing behaves when a run hangs.