This presentation will show two experiments conducted to evaluate the adequacy of OpenAI’s GPT-3 (as a representative of Large Language Models), for the purposes of post-editing and translating texts from English into Spanish, using a glossary of terms to ensure term consistency. The experiments are motivated by a use case in ULG MT Production, where we need to improve the usage of terminology glossaries in our NMT system. The purpose of the experiments is to take advantage of GPT-3 outstanding capabilities to generate text for completion and editing. We have used the edits end-point to post-edit the output of a NMT system using a glossary, and the completions end-point to translate the source text, including the glossary term list in the corresponding GPT-3 prompt. While the results are promising, they also show that there is room for improvement by fine-tuning the models, working on prompt engineering, and adjusting the requests parameters.