AssemblyAI has expanded its documentation to include tutorials for using their Speech-to-Text API to build voice applications, SDKs for Java and Go languages, Webhooks docs, and integrations with tools like LangChain, LlamaIndex, Zapier. They have also raised $50M in Series C funding led by Accel, allowing them to develop superior Speech AI models. Additionally, they provide a blog with insights on how to integrate LLMs into speech processing tasks and explanations of various AI concepts.