Vocab Builder is a GPT built on ChatGPT, designed to assist with English vocabulary learning. The GPT provides detailed examples to facilitate comprehension, making it suitable for both English language learners and native speakers seeking to broaden their vocabulary. Engagement with this GPT offers an interactive and contextual way of understanding English words, by using them in sentences and clarifying any ambiguity related to their usage or meaning. Vocab Builder can contribute to learning English vocabulary in a more effective and entertaining way.Intelligent features of Vocab Builder comprise of its prompt starters, which pose questions like 'How do you use 'enigma' in a sentence?', 'Is 'birds' in the sentence singular or plural?', 'Define 'amble' and is it transitive or intransitive?', and 'Could you clarify what you mean by 'florid'?' amongst others. These prompts enable learners to engage with the GPT and promote active participation in pursuing vocabulary objectives. Vocab Builder utilizes these prompts to not only help learners understand how to use a word, but also explain more complex language concepts like singularity or plurality and transitivity or intransitivity of verbs.Vocab Builder's welcoming framework greets users with a friendly message to ease them into the educational process, encouraging learners to explore and understand English vocabulary together. This GPT, part of the ChatGPT community tools, necessitates a ChatGPT Plus subscription. Its user-oriented approach makes it a beneficial tool for anyone looking to deepen their English language skills.