The v2 emulators are the emulators used in The Atacama Cosmology Telescope: DR6 Constraints on Extended Cosmological Models (2025).
These emulators were then used in Impact of ACT DR6 and DESI DR2 for Early Dark Energy and the Hubble tension by Poulin et al (2025).
They are the highest accuracy class-based emulators available on this organization and match the camb-based Jense et al. (2024) Emulators in LCDM well under 0.1-$\sigma$ where
The emulators can be used in LCDM, mnu-LCDM, w-CDM and Neff-LCDM and combinations of these.
They emulate distances, TT, TE, EE, BB and P(k).