AI accuracy measures how often a model's predictions match the actual outcomes, calculated as the ratio of correct predictions to total predictions. However, achieving high accuracy doesn't automatically indicate a high-quality AI model, especially with imbalanced datasets. Real-world conditions introduce various challenges that can affect accuracy over time, including data quality issues, evolving environments, and ethical considerations. Ensuring high-quality, diverse data is crucial for accurate AI models, while choosing the right model for the task and using advanced evaluation metrics like BLEU, ROUGE, BERTScore, perplexity, and context-aware metrics are also essential. Galileo's Luna Evaluation Suite offers a comprehensive platform that combines autonomous evaluation, real-time monitoring, and proactive protection to create an end-to-end solution for AI development and deployment.