{"id":1441,"date":"2026-09-18T11:05:00","date_gmt":"2026-09-18T09:05:00","guid":{"rendered":"https:\/\/chatx.ai\/blog\/gpt-image-2-5-flare-ou-sunburst\/"},"modified":"2026-09-24T00:37:03","modified_gmt":"2026-09-24T00:37:03","slug":"gpt-image-2-5-flare-sunburst","status":"publish","type":"post","link":"https:\/\/chatx.ai\/blog\/fr\/gpt-image-2-5-flare-sunburst\/","title":{"rendered":"GPT Image 2.5 Flare ou Sunburst ?"},"content":{"rendered":"<p class=\"intro\">Avec GPT Image 2.5, OpenAI remplace son mod\u00e8le d&#8217;images GPT Image 2 et le scinde pour la premi\u00e8re fois en deux variantes. Flare est la rapide, Sunburst la plus solide. Le progr\u00e8s principal ne tient pas \u00e0 de plus jolies images mais \u00e0 la pr\u00e9cision. Ce qui est \u00e9crit dans le prompt sort plus souvent tel quel. Nous expliquons ce que montrent les tests et donnons trois exemples de prompts qui marchent bien sur ChatX.<\/p>\n<nav class=\"toc\">\n<ul>\n<li><a href=\"#variantes\">Deux variantes, un m\u00eame but<\/a><\/li>\n<li><a href=\"#tests\">Ce que montrent les tests ind\u00e9pendants<\/a><\/li>\n<li><a href=\"#chatx\">Comment en tirer le maximum sur ChatX<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 id=\"variantes\">Deux variantes, un m\u00eame but<\/h2>\n<p>D&#8217;apr\u00e8s <a href=\"https:\/\/openai.com\/index\/introducing-chatgpt-images-2-5\/\" target=\"_blank\" rel=\"noopener\">OpenAI<\/a>, <strong>Sunburst<\/strong> est son mod\u00e8le le plus performant pour la g\u00e9n\u00e9ration et la retouche d&#8217;images. <strong>Flare<\/strong> est la variante plus petite et plus rapide, d&#8217;un niveau de qualit\u00e9 proche de GPT Image 2, avec une attente nettement plus courte. Les deux cr\u00e9ent des images \u00e0 partir de texte, retouchent des images existantes, g\u00e8rent les fonds transparents et sortent jusqu&#8217;\u00e0 3840 pixels de c\u00f4t\u00e9. Les prix par token sont identiques eux aussi. La diff\u00e9rence ne porte donc pas sur les fonctions : Flare est surtout plus rapide, Sunburst surtout meilleure.<\/p>\n<p>Les deux partagent un point cl\u00e9 : lors d&#8217;une retouche, les personnes et les objets sont conserv\u00e9s. Si tu places un personnage dans une autre sc\u00e8ne ou changes la perspective, tu r\u00e9cup\u00e8res le m\u00eame personnage, pas un personnage ressemblant. C&#8217;\u00e9tait le reproche le plus fr\u00e9quent fait \u00e0 GPT Image 2.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; text-align: left;\" border=\"1\" cellpadding=\"10\">\n<thead style=\"background-color: #f0f0f0;\">\n<tr>\n<th style=\"text-align: left;\" scope=\"col\">Ton objectif<\/th>\n<th style=\"text-align: left;\" scope=\"col\">Variante<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\">Produire vite de nombreuses \u00e9bauches ou variantes<\/td>\n<td style=\"text-align: left;\">Flare<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Visuels pour les r\u00e9seaux sociaux et photos produit simples<\/td>\n<td style=\"text-align: left;\">Flare<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">L&#8217;attente courte compte plus que la pr\u00e9cision ultime<\/td>\n<td style=\"text-align: left;\">Flare<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Qualit\u00e9 maximale pour l&#8217;image finale<\/td>\n<td style=\"text-align: left;\">Sunburst<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Modifier des images existantes de fa\u00e7on cibl\u00e9e<\/td>\n<td style=\"text-align: left;\">Sunburst<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Conserver visages, produits et d\u00e9tails<\/td>\n<td style=\"text-align: left;\">Sunburst<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Sc\u00e8nes complexes, mises en page, publicit\u00e9s, \u00e9l\u00e9ments de marque<\/td>\n<td style=\"text-align: left;\">Sunburst<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">Prompts exigeants avec peu de reprises<\/td>\n<td style=\"text-align: left;\">Sunburst<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"tests\">Ce que montrent les tests ind\u00e9pendants<\/h2>\n<p>Un test de <a href=\"https:\/\/www.mindstudio.ai\/blog\/gpt-image-25-review\" target=\"_blank\" rel=\"noopener\">MindStudio<\/a> confirme cette lecture litt\u00e9rale. Un \u00ab verre de vin rempli \u00e0 ras bord \u00bb ou une horloge affichant 4:37 sortent correctement, des exercices classiques que les mod\u00e8les d&#8217;images ratent parce qu&#8217;ils peignent l&#8217;habituel plut\u00f4t que le d\u00e9crit. Sur la coh\u00e9rence d&#8217;un personnage \u00e0 travers plusieurs vues, GPT Image 2.5 devance Nano Banana 2 et Nano Banana Pro.<\/p>\n<p>Les faiblesses sont tout aussi nettes :<\/p>\n<ul>\n<li><strong>Les personnes ins\u00e9r\u00e9es<\/strong> paraissent parfois coll\u00e9es, avec une lumi\u00e8re et des ombres qui ne collent pas au d\u00e9cor.<\/li>\n<li><strong>Trop de conditions \u00e0 la fois<\/strong> font s&#8217;accumuler les erreurs. \u00c0 partir de cinq consignes environ dans un prompt, l&#8217;une passe g\u00e9n\u00e9ralement \u00e0 la trappe.<\/li>\n<li><strong>Esth\u00e9tique pure :<\/strong> si tu veux juste une belle image d&#8217;ambiance, Nano Banana Pro donne parfois un rendu plus flatteur. GPT Image 2.5 est le mod\u00e8le de la pr\u00e9cision.<\/li>\n<\/ul>\n<h2 id=\"chatx\">Comment en tirer le maximum sur ChatX<\/h2>\n<p>Les deux variantes figurent dans la fen\u00eatre d&#8217;images de ChatX. \u00ab GPT Image 2.5 Flare \u00bb est la rapide, \u00ab GPT Image 2.5 Sunburst \u00bb la pr\u00e9cise. Les deux cr\u00e9ent de nouvelles images et retouchent celles que tu t\u00e9l\u00e9verses : le choix se fait donc sur la vitesse ou la qualit\u00e9, pas sur la t\u00e2che. Comme le prix par token est identique, Sunburst ne co\u00fbte pas plus que Flare \u00e0 niveau de qualit\u00e9 \u00e9gal. Tu peux aussi choisir le format, la taille, la qualit\u00e9 (Basse, Moyenne, Haute), le type et la transparence. Le niveau de qualit\u00e9 d\u00e9termine le co\u00fbt : une image en \u00ab Haute \u00bb consomme plusieurs fois les tokens d&#8217;image d&#8217;une image en \u00ab Basse \u00bb. Pour des \u00e9bauches et des visuels de r\u00e9seaux sociaux, \u00ab Basse \u00bb suffit presque toujours. \u00ab Haute \u00bb ne se justifie que pour l&#8217;impression ou les grands affichages.<\/p>\n<p>Trois prompts qui rendent visible l&#8217;\u00e9cart avec les mod\u00e8les plus anciens :<\/p>\n<ul>\n<li><strong>Une heure ou un chiffre pr\u00e9cis :<\/strong> \u00ab Un panneau de gare portant l&#8217;inscription \u2018Voie 7\u2019, en dessous une horloge analogique affichant 9:20, matin nuageux, aucun logo d&#8217;entreprise. \u00bb Les anciens mod\u00e8les donnent 10:10 et du texte invent\u00e9. GPT Image 2.5 respecte la consigne.\n<p style=\"margin: 10px 0 14px;\"><a href=\"https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-gleis-7-uhr-920.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1281\" style=\"border-radius: 12px; display: block; max-width: 100%; height: auto;\" src=\"https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-gleis-7-uhr-920-768x512.jpg\" alt=\"Panneau de gare voie 7 avec une horloge indiquant 9:20, g\u00e9n\u00e9r\u00e9 par GPT Image 2.5 Sunburst\" width=\"500\" height=\"333\" srcset=\"https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-gleis-7-uhr-920-768x512.jpg 768w, https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-gleis-7-uhr-920-300x200.jpg 300w, https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-gleis-7-uhr-920-1024x683.jpg 1024w, https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-gleis-7-uhr-920.jpg 1536w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><span style=\"display: block; max-width: 500px; margin-top: 4px; font-size: 0.85em; line-height: 1.4; color: #666;\">Notre r\u00e9sultat avec Sunburst en qualit\u00e9 \u00ab Haute \u00bb. Le panneau et l&#8217;heure sont justes. Sans la mention \u00ab aucun logo d&#8217;entreprise \u00bb, le mod\u00e8le avait pos\u00e9 un logo ferroviaire sur l&#8217;horloge au premier essai.<\/span><\/p>\n<\/li>\n<li><strong>Photo produit avec consignes :<\/strong> \u00ab Une tasse bleue en \u00e9mail sur une table en bois clair, \u00e9clair\u00e9e depuis la gauche, arri\u00e8re-plan flou, sans texte, format carr\u00e9. \u00bb Peu de conditions, mais claires : le r\u00e9sultat reste stable.\n<p style=\"margin: 10px 0 14px;\"><a href=\"https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-emaille-tasse.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1282\" style=\"border-radius: 12px; display: block; max-width: 100%; height: auto;\" src=\"https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-emaille-tasse-768x768.jpg\" alt=\"Tasse bleue en \u00e9mail sur une table en bois \u00e9clair\u00e9e depuis la gauche, g\u00e9n\u00e9r\u00e9e par GPT Image 2.5 Sunburst\" width=\"500\" height=\"500\" srcset=\"https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-emaille-tasse-768x768.jpg 768w, https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-emaille-tasse-300x300.jpg 300w, https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-emaille-tasse-150x150.jpg 150w, https:\/\/chatx.ai\/blog\/wp-content\/uploads\/2026\/09\/gpt-image-2-5-beispiel-emaille-tasse.jpg 1024w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><span style=\"display: block; max-width: 500px; margin-top: 4px; font-size: 0.85em; line-height: 1.4; color: #666;\">M\u00eame d\u00e9marche avec le prompt de la tasse. Couleur, mati\u00e8re, direction de la lumi\u00e8re et flou ont tous \u00e9t\u00e9 respect\u00e9s.<\/span><\/p>\n<\/li>\n<li><strong>Retouche avec Sunburst :<\/strong> t\u00e9l\u00e9verse l&#8217;image et n&#8217;indique que la modification. \u00ab Remplace le ciel par un coucher de soleil rouge, laisse tout le reste inchang\u00e9. \u00bb La mention \u00ab laisse tout le reste inchang\u00e9 \u00bb emp\u00eache le mod\u00e8le de toucher au passage aux visages ou aux couleurs.<\/li>\n<\/ul>\n<p>Une r\u00e8gle vaut pour les deux variantes : court, concret, par ordre d&#8217;importance. Ce qui vient en premier dans le prompt est appliqu\u00e9 le plus fid\u00e8lement. Et si tu veux retoucher une image plusieurs fois, corrige le bon r\u00e9sultat pas \u00e0 pas avec Sunburst au lieu de tout reg\u00e9n\u00e9rer \u00e0 chaque essai. Cela \u00e9conomise des tentatives et des tokens.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avec GPT Image 2.5, OpenAI remplace son mod\u00e8le d&#8217;images GPT Image 2 et le scinde pour la premi\u00e8re fois en deux variantes. Flare est la rapide, Sunburst la plus solide. Le progr\u00e8s principal ne tient pas \u00e0 de plus jolies images mais \u00e0 la pr\u00e9cision. Ce qui est \u00e9crit dans le prompt sort plus souvent [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1328,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[619],"tags":[],"class_list":["post-1441","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chatgpt"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>GPT Image 2.5 Flare ou Sunburst ? - ChatX Blog<\/title>\n<meta name=\"description\" content=\"Flare est rapide, Sunburst est pr\u00e9cis et les deux co\u00fbtent pareil. 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