From transcript to summary to follow-up items: Speech understanding gets an LLM upgrade

AssemblyAI has reintroduced and upgraded its Summarization and Action Items features within the speech_understanding request object, enabling developers to receive transcripts alongside LLM-generated, topic-based summaries and structured follow-ups in a single API request. Summaries now include headlines and start and end timestamps, can be returned as concise bullets or detailed paragraphs, and offer low or medium effort settings depending on the importance and complexity of the audio. Action Items independently extracts commitments and to-dos with supporting quotes and timestamps, allowing results to feed task trackers, CRMs, or follow-up communications. These capabilities join translation, speaker identification, and custom formatting as composable native audio-processing features, while the LLM Gateway supports custom extraction and generation tasks using multiple external models. Summarization costs $0.05 per audio hour and Action Items costs $0.02 per hour, and AssemblyAI is deprecating older top-level summarization and auto_chapters parameters, which will cease functioning after September 15, 2026.

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