This widespread practice is costing companies thousands while delivering questionable value.
Here's why your LLM evaluation strategy might be broken:
1. Generic evals are practically USELESS • Hallucination and toxicity scores mean nothing without context • Your use case is unique - generic metrics rarely capture what matters
2. More evaluation ≠ better results • Evaluating entire conversations drastically reduces judge accuracy • Specific, targeted inputs yield more reliable scores
3. Your judges need guidance too • Binary outputs with justification > arbitrary 1-5 scales • Few-shot examples from YOUR domain are critical
4. The reliability problem is real • Position bias: favors responses based on presentation order • Verbosity bias: longer responses get better scores regardless of quality • Self-enhancement bias: models favor their own outputs
Smart evaluation strategies that won't break the bank:
• Sample strategically instead of evaluating everything • Combine automated evals with periodic human validation • Provide context-specific examples to your judge • Always request justification, not just scores
Remember: The best benchmark isn't some generic leaderboard - it's how well the model performs in YOUR specific application.