What is browser execution layer?
A browser execution layer is the system that sits between a language-model agent and a live browser, taking a natural-language goal and producing reliable, repeatable action against real pages. Twin’s execution layer bundles the DOM compiler, planner, skill cache, deterministic replay, credential vault, human handoff, and session video behind a single token-efficient API.
Why it matters
Without an execution layer, every team rebuilds the same brittle glue between an LLM and a browser and pays the model on every run. Consolidating that into one layer — and adding a semantic cache on top — is what turns ad-hoc agent scripts into production automation whose cost falls with scale.
See it in context: read how Twin compiles and replays a run, follow the cost-cutting guide, or browse use cases and comparisons.