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Summary: Default differentiation of human pluripotent stem cells has been promoted as a model of cortical development. In this study, a developmental transcriptome analysis of default-differentiated hPSNs revealed a gene expression program resembling in vivo CGE/LGE subpallial domains and GABAergic signaling. A combination of bioinformatic, functional, and immunocytochemical analysis further revealed that hPSNs consist of both cortical glutamatergic and CGE-like GABAergic neurons. This study provides a comprehensive characterization of the heterogeneous group of neurons produced by default differentiation and insight into future directed differentiation strategies. : Default differentiation of human pluripotent stem cell-derived neurons (hPSNs) is thought to be a model of cortical differentiation. The authors performed transcriptome, time-course analysis of developing and mature hPSNs. In addition to cortical glutamatergic neurons, default differentiation led to significant CGE/LGE-specific GABAergic patterning. This work comprehensively characterizes the heterogeneity of neurons produced by default differentiation. Keywords: human pluripotent stem cells, cortical neurons, subpallium, CGE, development, microarray, COUPTFII, CALB2