The AssemblyAI Java SDK is now available, allowing users to transcribe audio files both asynchronously and in real-time, utilize their audio intelligence model, and apply large language models (LLMs) through LeMUR. Key features include transcribing audio from a file or real-time input from a microphone, using LLMs for tasks like summarization on transcripts, and accessing audio intelligence models to analyze sentiment, among other capabilities. The SDK is designed with simplicity in mind, offering comprehensive documentation and usage examples within its GitHub repository.