The present disclosure provides systems and methods for sequencing nucleic acid molecules using tunneling labels. A sequence of a nucleic acid molecule may be identified with high accuracy using a chip comprising sensors, wherein each individual sensor may comprise at least two electrodes separated by a gap. The electrodes may be configured to generate at least one electrical signal upon binding of a tunneling label associated with a nucleotide. Epigenetic information can also be determined at the same time as a nucleic acid sequence.