³He/⁴He as a function of E_k/n for AMS-02 (purple squares) and PAMELA (green crosses)–the latter combine data from two different analysis, respectively PAMELA-ToF and PAMELA-Calorimeter (Adriani et al. 2016). All models are calculated from the best-fit parameters of the combined analysis of Li/C, Be/C, B/C, N/O, ³He, and ⁴He AMS-02 data. Different line styles show different model configurations (BIG, SLIM, and QUAINT) and their respective post-fit solar modulation level in purple. Green lines show the same model calculations but modulated at the PAMELA expected value of 539 MV.