Author

Vineet Kumar

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#artificial intelligence Preprint Oct 2026

All Verdicts are Not Equal: Rethinking LLM Judge Reliability

LLM-as-a-Judge is the standard paradigm for NLP evaluation, yet its systemic reliability remains poorly understood despite being widely treated as a deterministic ground truth. We present a comprehensive reliability audit, stresstesting six frontier models across four benchmarks, five prompt formats, two presentation o...

Vineet Kumar, Darshita Rathore, Anindya Moitra · 0 citations

#artificial intelligence Preprint Oct 2026

Structure Tax: How Structured Output affects LLMs Performance

Deploying large language models in production often requires constraining outputs to structured formats such as JSON or XML, and prior work treats the resulting accuracy loss as an inherent `structure tax'. We re-examine this claim by evaluating a battery of models, datasets and schemas, measuring task accuracy, confid...

Vineet Kumar, Kanishka, Bhuvanesh Mandora · 0 citations