In a large production dataset, the Google STT plus GPT-4.1 plus Cartesia TTS interview stack outperformed four alternatives, while LLM-judged quality correlated weakly with user satisfaction.
{index}" - LLM model: {model} - interview_transcript:
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Evaluating Speech-to-Text x LLM x Text-to-Speech Combinations for AI Interview Systems
In a large production dataset, the Google STT plus GPT-4.1 plus Cartesia TTS interview stack outperformed four alternatives, while LLM-judged quality correlated weakly with user satisfaction.