AURA is an open-source, voice-centric AI assistant that can perform complex, goal-oriented tasks using a variety of tools, such as calendar scheduling, contact lookups, web searches, and email. It is designed to be a chain of speech recognition (ASR), text-to-speech synthesis (TTS), and large-scale language models (LLM), and has a modular architecture that allows easy integration of new tools using natural language prompts and action classes. In the VoiceBench evaluation, it scored 92.75% on OpenBookQA, outperforming existing open-source systems and approaching GPT-4, and 4.39 on AlpacaEval, showing competitive results with other open-source systems. It achieved a 90% success rate in human evaluation on complex multi-pass speech tasks.