--- title: Stop Evaluating Models Like It's the 50s - Alejandro... description: A talk proposing the application of Item Response Theory (IRT) from psychometrics to improve LLM benchmark evaluation. Instead of simply counting correct... canonical: https://daily.dev/posts/stop-evaluating-models-like-it-s-the-50s---alejandro-vidal-mindmakers-wc7mrpx5o twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Stop Evaluating Models Like It's the 50s - Alejandro Vidal, Mindmakers | daily.dev og:description: A talk proposing the application of Item Response Theory (IRT) from psychometrics to improve LLM benchmark evaluation. Instead of simply counting correct... og:url: https://daily.dev/posts/stop-evaluating-models-like-it-s-the-50s---alejandro-vidal-mindmakers-wc7mrpx5o og:image: https://api.daily.dev/og/posts/wC7MRPx5o.png og:image:alt: Stop Evaluating Models Like It's the 50s - Alejandro Vidal, Mindmakers og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Stop Evaluating Models Like It's the 50s - Alejandro Vidal, Mindmakers **[AI Engineer](https://daily.dev/sources/aidotengineer)** · 23 min read · 1 upvotes · 0 comments ## Summary A talk proposing the application of Item Response Theory (IRT) from psychometrics to improve LLM benchmark evaluation. Instead of simply counting correct answers (classical test theory), IRT assigns each benchmark question a difficulty parameter (B) and discrimination parameter (A), and estimates each model's intelligence level (theta) as a distribution with confidence intervals. Practical applications demonstrated include: auditing benchmarks to detect mislabeled or negatively discriminating questions, reducing benchmark size by up to 5x while maintaining 99% ranking correlation, detecting benchmark contamination/overfitting via residual analysis, protecting benchmarks using adaptive testing with fingerprint item sets, identifying bias between open-weight and closed-weight models, and clustering models by residual correlations to detect distillations and model lineage. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Your AI Interviewer Can’t Pass Its Own Test](https://daily.dev/posts/your-ai-interviewer-can-t-pass-its-own-test-ptlhkj7gk) · Medium · 1 upvotes · 0 comments - [A better method for identifying overconfident large language models](https://daily.dev/posts/a-better-method-for-identifying-overconfident-large-language-models-0snquezne) · MIT News · 1 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm) [View this post on daily.dev](https://daily.dev/posts/stop-evaluating-models-like-it-s-the-50s---alejandro-vidal-mindmakers-wc7mrpx5o) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Stop Evaluating Models Like It's the 50s - Alejandro Vidal, Mindmakers","url":"https://daily.dev/posts/stop-evaluating-models-like-it-s-the-50s---alejandro-vidal-mindmakers-wc7mrpx5o","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/stop-evaluating-models-like-it-s-the-50s---alejandro-vidal-mindmakers-wc7mrpx5o"},"datePublished":"2026-07-13T18:11:01.272Z","dateModified":"2026-07-13T18:16:33.080Z","description":"A talk proposing the application of Item Response Theory (IRT) from psychometrics to improve LLM benchmark evaluation. Instead of simply counting correct...","image":"https://i.ytimg.com/vi/O3FEoMYvUf8/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/O3FEoMYvUf8/sddefault.jpg","isAccessibleForFree":true,"articleSection":"AI Engineer","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"AI Engineer","logo":"https://media.daily.dev/image/upload/s--u5PucxNT--/f_auto/v1724338940/logos/aidotengineer","url":"https://daily.dev/sources/aidotengineer"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/stop-evaluating-models-like-it-s-the-50s---alejandro-vidal-mindmakers-wc7mrpx5o","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"llm","timeRequired":"PT23M","video":{"@type":"VideoObject","name":"Stop Evaluating Models Like It's the 50s - Alejandro Vidal, Mindmakers","description":"A talk proposing the application of Item Response Theory (IRT) from psychometrics to improve LLM benchmark evaluation. Instead of simply counting correct...","thumbnailUrl":"https://i.ytimg.com/vi/O3FEoMYvUf8/sddefault.jpg","uploadDate":"2026-07-13T18:11:01.272Z","duration":"PT23M","url":"https://api.daily.dev/r/wC7MRPx5o","embedUrl":"https://www.youtube.com/embed/O3FEoMYvUf8"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"AI Engineer","item":"https://daily.dev/sources/aidotengineer"},{"@type":"ListItem","position":3,"name":"Stop Evaluating Models Like It's the 50s - Alejandro Vidal, Mindmakers"}]} ```