AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
sandbox — An isolated environment where AI-generated code or agent actions run without being able to touch anything real.
model routing — Sending each request to a model chosen by the difficulty of the task, rather than using one model for everything.
Why it matters
Most AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → work sits behind logins, forms and dashboards no API exposes. Browserbase bundles browsers, search, fetch, sandboxes and model routingSending each request to a model chosen by the difficulty of the task, rather than using one model for everything.Full definition → under one key, removing the multi-vendor seams where browser agents usually break.
