How do I install the beta version and whats the difference between beta and dev

Beta is the npm dist‑tag beta (may match latest).
Dev is the moving head of main (git); when published, it uses the npm dist‑tag dev.
One‑liners (macOS/Linux):
curl -fsSL --proto '=https' --tlsv1.2 https://openclaw.ai/install.sh | bash -s -- --beta
curl -fsSL --proto '=https' --tlsv1.2 https://openclaw.ai/install.sh | bash -s -- --install-method git
Windows installer (PowerShell): https://openclaw.ai/install.ps1
More detail: Development channels and Installer flags.