It is widely recognized that conjugated alkenes are more stable than cumulenes.The cumulene molecule generated by UVGPT does not conform to an optimal structure within the bounds of established chemical knowledge. For example, the molecule with the SMILES of CC1NC(C)=C=C1 (cumulene) lies kcal/mol higher than the isomer of in Gibbs energy. Addressing this issue requires incorporating additional chemists' intuition and improving the quality of datasets utilized.