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When Synthetic Speech Is All You Have: Better Call GRPO🔥 hot

AI·LLM-based ASR in regulated domains like banking is limited by privacy and real-speech collection costs; synthetic TTS data is a cost-effective substitute, but acoustic mismatch hinders supervised fine-tuning (SFT). Group Relative Policy Optimization (GRPO) applied solely to synthetic speech reduces WER by 40% relative to SFT (36.71% to 22.09%) and by 45% in the SFT-then-GRPO sequence, by improving behavioral calibration and audio attention rather than representations.

Grok Build CLI uploads your whole repo — full git history + .env secrets — to xAI's cloud, and the opt-out doesn't stop it (wire-captured)

AI·Grok Build CLI leaks entire repo git history with .env secrets to xAI cloud, opt-out ineffective and prompts ignored.

Private analytics via zero-trust aggregation

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