Le pre-training est une \u00e9tape cruciale dans l’apprentissage automatique, notamment pour les mod\u00e8les de langage utilis\u00e9s en prompt engineering. Qu’est-ce que le pre-training\u00a0? C’est une phase d’entra\u00eenement initiale o\u00f9 un mod\u00e8le d’IA apprend des repr\u00e9sentations g\u00e9n\u00e9rales \u00e0 partir d’un vaste ensemble de donn\u00e9es.<\/p>\n
Imaginez un apprenti cuisinier. Avant de se sp\u00e9cialiser en p\u00e2tisserie, il apprend les bases\u00a0: couper les l\u00e9gumes, ma\u00eetriser les cuissons, utiliser les ustensiles. Le pre-training, c’est comme cet apprentissage fondamental. Un mod\u00e8le d’IA, tel qu’un mod\u00e8le de langage, est expos\u00e9 \u00e0 une \u00e9norme quantit\u00e9 de texte\u00a0: livres, articles, code informatique. Il apprend \u00e0 pr\u00e9dire les mots, \u00e0 identifier les structures grammaticales, \u00e0 saisir le contexte. Il ne se concentre pas encore sur une t\u00e2che sp\u00e9cifique, mais acquiert des connaissances g\u00e9n\u00e9rales sur le langage.<\/p>\n
Ce pr\u00e9-entra\u00eenement est essentiel car il permet aux mod\u00e8les d’IA d’\u00eatre plus performants lorsqu’ils sont ensuite entra\u00een\u00e9s pour des t\u00e2ches sp\u00e9cifiques (fine-tuning). Reprenons l’analogie du cuisinier\u00a0: une fois les bases acquises, il lui sera plus facile d’apprendre des recettes complexes. De m\u00eame, un mod\u00e8le pr\u00e9-entra\u00een\u00e9 sur un large corpus de texte pourra plus facilement \u00eatre sp\u00e9cialis\u00e9 pour la traduction, la g\u00e9n\u00e9ration de texte ou la r\u00e9ponse \u00e0 des questions. Par exemple, un mod\u00e8le pr\u00e9-entra\u00een\u00e9 peut \u00eatre affin\u00e9 pour g\u00e9n\u00e9rer des descriptions de produits \u00e0 partir de quelques mots cl\u00e9s, ou pour r\u00e9sumer des articles de presse.<\/p>\n
Le pre-training est une \u00e9tape cruciale dans l’apprentissage automatique, notamment pour les mod\u00e8les de langage utilis\u00e9s en prompt engineering. Qu’est-ce que le pre-training\u00a0? C’est une phase d’entra\u00eenement initiale o\u00f9 un mod\u00e8le d’IA apprend des repr\u00e9sentations g\u00e9n\u00e9rales \u00e0 partir d’un vaste ensemble de donn\u00e9es. Comment fonctionne le Pre-training\u00a0? Imaginez un apprenti cuisinier. Avant de se sp\u00e9cialiser […]<\/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":[71],"tags":[260,91,561,47],"class_list":["post-1133","post","type-post","status-publish","format-standard","hentry","category-p","tag-fine-tuning","tag-modele-de-langage","tag-pre-training","tag-transfer-learning"],"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":"Le pre-training est une \u00e9tape cruciale dans l’apprentissage automatique, notamment pour les mod\u00e8les de langage utilis\u00e9s en prompt engineering. Qu’est-ce que le pre-training\u00a0? C’est une phase d’entra\u00eenement initiale o\u00f9 un mod\u00e8le d’IA apprend des repr\u00e9sentations g\u00e9n\u00e9rales \u00e0 partir d’un vaste ensemble de donn\u00e9es. Comment fonctionne le Pre-training\u00a0? Imaginez un apprenti cuisinier. Avant de se sp\u00e9cialiser\u2026","_links":{"self":[{"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/posts\/1133","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=1133"}],"version-history":[{"count":0,"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/posts\/1133\/revisions"}],"wp:attachment":[{"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/media?parent=1133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/categories?post=1133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/happynumeric.com\/lexique-intelligence-artificielle\/wp-json\/wp\/v2\/tags?post=1133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}