NCEES states that only the listed calculator models are acceptable for the 2026 exams. The Casio portion of the whitelist covers fx-115 and fx-991 models. The Casio fx-CG50 is a separate graphing family and does not contain fx-115 or fx-991 in the model name, so this verdict treats it as banned for FE exam use.
“The following calculator models are the only ones acceptable for use during the 2026 exams”