{"id":1191,"date":"2025-01-01T10:00:00","date_gmt":"2025-01-01T09:00:00","guid":{"rendered":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/t\/definition-top-k\/"},"modified":"2025-01-01T10:00:00","modified_gmt":"2025-01-01T09:00:00","slug":"definition-top-k","status":"publish","type":"post","link":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/t\/definition-top-k\/","title":{"rendered":"Top-k"},"content":{"rendered":"<p>En intelligence artificielle et en prompt engineering, le Top-K est une m\u00e9thode de s\u00e9lection des r\u00e9ponses les plus probables g\u00e9n\u00e9r\u00e9es par un mod\u00e8le. Qu&rsquo;est-ce que Top-K ? C&rsquo;est une technique qui s\u00e9lectionne les <em>K<\/em> r\u00e9sultats les plus probables parmi un ensemble de pr\u00e9dictions, <em>K<\/em> \u00e9tant un nombre entier que vous d\u00e9finissez.<\/p>\n<h3>Comment fonctionne Top-K ?<\/h3>\n<p>Top-K filtre les pr\u00e9dictions d&rsquo;un mod\u00e8le en ne conservant que les <em>K<\/em> plus probables. Imaginez que vous demandiez \u00e0 un mod\u00e8le de compl\u00e9ter la phrase \u00ab\u00a0J&rsquo;aime manger des&#8230;\u00a0\u00bb.  Parmi des milliers de possibilit\u00e9s, le mod\u00e8le attribue une probabilit\u00e9 \u00e0 chaque mot.  Avec Top-K = 3, seules les trois suggestions les plus probables, par exemple \u00ab\u00a0pommes\u00a0\u00bb, \u00ab\u00a0bananes\u00a0\u00bb et \u00ab\u00a0fraises\u00a0\u00bb, seront conserv\u00e9es. Les autres, m\u00eame si plausibles, seront ignor\u00e9es. Le choix de la valeur de <em>K<\/em> influence directement la cr\u00e9ativit\u00e9 et la pr\u00e9cision des r\u00e9ponses. Un <em>K<\/em> faible privil\u00e9gie la pr\u00e9cision mais peut \u00eatre limitant, tandis qu&rsquo;un <em>K<\/em> \u00e9lev\u00e9 favorise la diversit\u00e9 mais augmente le risque d&rsquo;erreurs.<\/p>\n<h3>Pourquoi Top-K est-il important ?<\/h3>\n<p>Top-K est crucial pour contr\u00f4ler la pertinence et la diversit\u00e9 des r\u00e9ponses d&rsquo;un mod\u00e8le. En prompt engineering, il permet d&rsquo;affiner les r\u00e9sultats et de r\u00e9duire le bruit, notamment lors de la g\u00e9n\u00e9ration de texte. Par exemple, si vous g\u00e9n\u00e9rez un po\u00e8me, un Top-K faible privil\u00e9giera des rimes courantes et un style conventionnel.  Un Top-K \u00e9lev\u00e9, en revanche, pourrait produire des rimes plus originales, voire inattendues, augmentant la cr\u00e9ativit\u00e9 du po\u00e8me au risque d&rsquo;incoh\u00e9rences.<\/p>\n<h3>Termes associ\u00e9s<\/h3>\n<ul id=\"TermesAssocies\">\n<li><a href=\"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/?s=%2A%2ATemperature%3A%2A%2A++Param%C3%A8tre+qui+contr%C3%B4le+la+%22cr%C3%A9ativit%C3%A9%22+du+mod%C3%A8le+en+influen%C3%A7ant+la+distribution+de+probabilit%C3%A9.\">**Temperature:**  Param\u00e8tre qui contr\u00f4le la \u00ab\u00a0cr\u00e9ativit\u00e9\u00a0\u00bb du mod\u00e8le en influen\u00e7ant la distribution de probabilit\u00e9.<\/a><\/li>\n<li><a href=\"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/?s=%2A%2ATop-P+%28nucleus+sampling%29%3A%2A%2A++M%C3%A9thode+alternative+de+s%C3%A9lection+des+pr%C3%A9dictions+bas%C3%A9e+sur+un+seuil+de+probabilit%C3%A9+cumulative.\">**Top-P (nucleus sampling):**  M\u00e9thode alternative de s\u00e9lection des pr\u00e9dictions bas\u00e9e sur un seuil de probabilit\u00e9 cumulative.<\/a><\/li>\n<li><a href=\"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/?s=%2A%2APrompt+Engineering%3A%2A%2A+Discipline+qui+vise+%C3%A0+optimiser+les+instructions+donn%C3%A9es+aux+mod%C3%A8les+d%27IA+pour+obtenir+les+meilleurs+r%C3%A9sultats.\">**Prompt Engineering:** Discipline qui vise \u00e0 optimiser les instructions donn\u00e9es aux mod\u00e8les d&rsquo;IA pour obtenir les meilleurs r\u00e9sultats.<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>En intelligence artificielle et en prompt engineering, le Top-K est une m\u00e9thode de s\u00e9lection des r\u00e9ponses les plus probables g\u00e9n\u00e9r\u00e9es par un mod\u00e8le. Qu&rsquo;est-ce que Top-K ? C&rsquo;est une technique qui s\u00e9lectionne les K r\u00e9sultats les plus probables parmi un ensemble de pr\u00e9dictions, K \u00e9tant un nombre entier que vous d\u00e9finissez. Comment fonctionne Top-K ? [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[30],"tags":[677,675,674,676],"class_list":["post-1191","post","type-post","status-publish","format-standard","hentry","category-t","tag-prompt-engineering-discipline-qui-vise-a-optimiser-les-instructions-donnees-aux-modeles-dia-pour-obtenir-les-meilleurs-resultats","tag-temperature-parametre-qui-controle-la-creativite-du-modele-en-influencant-la-distribution-de-probabilite","tag-top-p-nucleus-sampling-methode-alternative-de-selection-des-predictions-basee-sur-un-seuil-de-probabilite-cumulative","tag-top-k"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"","author_link":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/author\/"},"uagb_comment_info":0,"uagb_excerpt":"En intelligence artificielle et en prompt engineering, le Top-K est une m\u00e9thode de s\u00e9lection des r\u00e9ponses les plus probables g\u00e9n\u00e9r\u00e9es par un mod\u00e8le. Qu&rsquo;est-ce que Top-K ? C&rsquo;est une technique qui s\u00e9lectionne les K r\u00e9sultats les plus probables parmi un ensemble de pr\u00e9dictions, K \u00e9tant un nombre entier que vous d\u00e9finissez. Comment fonctionne Top-K ?\u2026","_links":{"self":[{"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/posts\/1191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/comments?post=1191"}],"version-history":[{"count":0,"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/posts\/1191\/revisions"}],"wp:attachment":[{"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/media?parent=1191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/categories?post=1191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/tags?post=1191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}