> For the complete documentation index, see [llms.txt](https://sandchain.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sandchain.gitbook.io/docs/build/sandchain.md).

# SANDchain

SANDchain will be upgraded to [Atlas](https://zksync.mirror.xyz/XrlYJN9SUbOtRn9nyqrfPyaAqot--PlUcnSRK_OF1Bs), which will only go on to improve the efficiency of the network. Granting greater speed and cost efficiency for users.