As language models move from prototypes to production, reliable evaluation and continuous monitoring become make-or-break. These tools help teams reduce hallucinations, catch regressions early, and ship safer AI faster. This guide explains what they do, how to use them well, and what to check before choosing one.

Hiring teams expect focused, tailored cover letters that show clear motivation and fit. AI cover letter tools help applicants turn job descriptions and resumes into concise, on-brand letters in minutes, not hours. This guide explains what these tools do, who benefits most, and how to choose the right option for your job search.