Rubric-based evaluation is now a common way to score the outputs of language models and agents (Hashemi et al., 2024; Wei et al., 2025), and rubrics also serve as the source of reward signals in training (Gunjal et al., 2025; Liu et al., 2026; Ding, 2026). In both uses the rubric is the measurement instrument, and the validity of any… The post Checking the Rubrics: RIFT Results on Five Public Benchmarks appeared first on Snorkel AI .