{
  "id": "IA-0510",
  "version": "0.1",
  "date": "2026-11-02",
  "moteur": "0.3.1",
  "designation": "Moins de 25 ans en France, usage personnel, 1 an",
  "titre_court": "Moins de 25 ans",
  "description": "L'usage personnel de l'IA des 12 à 24 ans en France sur un an, hors études : 10,7 millions de jeunes, dont près de la moitié s'en sert pour eux-mêmes. Effectifs de l'Insee au 1er janvier 2026, parts d'utilisateurs d'Eurostat pour 2025.",
  "categorie": {
    "code": "monde",
    "nom": "Territoires"
  },
  "etage": {
    "code": "monde",
    "numero": "5",
    "nom": "Territoires"
  },
  "famille": {
    "code": "populations",
    "nom": "Populations"
  },
  "unite": "1 population · an",
  "grandeur": "electricite",
  "type": "recette",
  "statut": "estimé",
  "repose_sur": {
    "releves": 0,
    "conventions": 0,
    "hypotheses": 1
  },
  "valeur": {
    "electricite": {
      "valeur": 4759150000,
      "basse": 4456930000,
      "haute": 5727920000,
      "unite": "Wh",
      "fourchette": "propagee",
      "publie": false
    },
    "co2e": {
      "valeur": 2181070000,
      "basse": 2042560000,
      "haute": 2625050000,
      "unite": "gCO2e",
      "publie": false,
      "lieu": "monde",
      "gCO2e_par_kWh": 458.29
    },
    "facteur": null,
    "recomposition_Wh": 4759150000
  },
  "lieux": {
    "monde": {
      "libelle": "Dans le monde",
      "gCO2e_par_kWh": 458.29,
      "co2e_gCO2e": 2181070000
    },
    "france": {
      "libelle": "En France",
      "gCO2e_par_kWh": 41.44,
      "co2e_gCO2e": 197219000
    },
    "ue": {
      "libelle": "Dans l'Union européenne",
      "gCO2e_par_kWh": 209.9,
      "co2e_gCO2e": 998946000
    },
    "etats-unis": {
      "libelle": "Aux États-Unis",
      "gCO2e_par_kWh": 384.4,
      "co2e_gCO2e": 1829420000
    },
    "allemagne": {
      "libelle": "En Allemagne",
      "gCO2e_par_kWh": 329.65,
      "co2e_gCO2e": 1568850000
    },
    "irlande": {
      "libelle": "En Irlande",
      "gCO2e_par_kWh": 256.54,
      "co2e_gCO2e": 1220910000
    },
    "pays-bas": {
      "libelle": "Aux Pays-Bas",
      "gCO2e_par_kWh": 253.56,
      "co2e_gCO2e": 1206730000
    },
    "pologne": {
      "libelle": "En Pologne",
      "gCO2e_par_kWh": 588.6,
      "co2e_gCO2e": 2801240000
    },
    "suede": {
      "libelle": "En Suède",
      "gCO2e_par_kWh": 35.26,
      "co2e_gCO2e": 167808000
    },
    "norvege": {
      "libelle": "En Norvège",
      "gCO2e_par_kWh": 28.11,
      "co2e_gCO2e": 133780000
    },
    "suisse": {
      "libelle": "En Suisse",
      "gCO2e_par_kWh": 39.22,
      "co2e_gCO2e": 186654000
    },
    "finlande": {
      "libelle": "En Finlande",
      "gCO2e_par_kWh": 57.47,
      "co2e_gCO2e": 273508000
    }
  },
  "parametres": [],
  "reglages": [
    {
      "dimension": "adoption",
      "actuel": "courant",
      "valeurs": [
        {
          "cle": "sobre",
          "libelle": "Usage sobre",
          "defaut": false,
          "electricite_Wh": 810533000,
          "co2e_gCO2e": 371459000
        },
        {
          "cle": "courant",
          "libelle": "Usage courant",
          "defaut": true,
          "electricite_Wh": 4759150000,
          "co2e_gCO2e": 2181070000
        },
        {
          "cle": "intensif",
          "libelle": "Usage intensif",
          "defaut": false,
          "electricite_Wh": 23431200000,
          "co2e_gCO2e": 10738300000
        }
      ]
    },
    {
      "dimension": "outillage",
      "actuel": "assistant",
      "valeurs": [
        {
          "cle": "assistant",
          "libelle": "Assistant conversationnel",
          "defaut": true,
          "electricite_Wh": 4759150000,
          "co2e_gCO2e": 2181070000
        },
        {
          "cle": "suite",
          "libelle": "IA dans la suite bureautique",
          "defaut": false,
          "electricite_Wh": 4759150000,
          "co2e_gCO2e": 2181070000
        },
        {
          "cle": "agent",
          "libelle": "Agents",
          "defaut": false,
          "electricite_Wh": 18795900000,
          "co2e_gCO2e": 8613990000
        }
      ]
    },
    {
      "dimension": "classe",
      "actuel": "moyen",
      "valeurs": [
        {
          "cle": "petit",
          "libelle": "Petit modèle",
          "defaut": false,
          "electricite_Wh": 2400370000,
          "co2e_gCO2e": 1100070000
        },
        {
          "cle": "moyen",
          "libelle": "Modèle moyen",
          "defaut": true,
          "electricite_Wh": 5783640000,
          "co2e_gCO2e": 2650590000
        },
        {
          "cle": "grand",
          "libelle": "Grand modèle",
          "defaut": false,
          "electricite_Wh": 17962600000,
          "co2e_gCO2e": 8232070000
        }
      ]
    },
    {
      "dimension": "raisonnement",
      "actuel": "sans",
      "valeurs": [
        {
          "cle": "sans",
          "libelle": "Sans raisonnement",
          "defaut": true,
          "electricite_Wh": 4759150000,
          "co2e_gCO2e": 2181070000
        },
        {
          "cle": "moyen",
          "libelle": "Raisonnement moyen",
          "defaut": false,
          "electricite_Wh": 6264390000,
          "co2e_gCO2e": 2870910000
        },
        {
          "cle": "pousse",
          "libelle": "Raisonnement poussé",
          "defaut": false,
          "electricite_Wh": 19484300000,
          "co2e_gCO2e": 8929480000
        }
      ]
    },
    {
      "dimension": "taille",
      "actuel": "standard",
      "valeurs": [
        {
          "cle": "standard",
          "libelle": "Image standard",
          "defaut": true,
          "electricite_Wh": 4759150000,
          "co2e_gCO2e": 2181070000
        },
        {
          "cle": "grande",
          "libelle": "Grande image",
          "defaut": false,
          "electricite_Wh": 5646030000,
          "co2e_gCO2e": 2587520000
        }
      ]
    },
    {
      "dimension": "calage",
      "actuel": "mesures",
      "valeurs": [
        {
          "cle": "mesures",
          "libelle": "Calé sur les chiffres publiés",
          "defaut": true,
          "electricite_Wh": 4759150000,
          "co2e_gCO2e": 2181070000
        },
        {
          "cle": "bruts",
          "libelle": "Facteurs bruts",
          "defaut": false,
          "electricite_Wh": 5975640000,
          "co2e_gCO2e": 2738580000
        }
      ]
    },
    {
      "dimension": "duree",
      "actuel": "an",
      "valeurs": [
        {
          "cle": "an",
          "libelle": "Un an",
          "defaut": true,
          "electricite_Wh": 4759150000,
          "co2e_gCO2e": 2181070000
        },
        {
          "cle": "mois",
          "libelle": "Un mois",
          "defaut": false,
          "electricite_Wh": 396596000,
          "co2e_gCO2e": 181756000
        },
        {
          "cle": "jour",
          "libelle": "Un jour",
          "defaut": false,
          "electricite_Wh": 13038800,
          "co2e_gCO2e": 5975540
        }
      ]
    }
  ],
  "curseurs": [
    {
      "cle": "jours",
      "defaut": 365
    },
    {
      "cle": "secondes",
      "defaut": 5.4
    }
  ],
  "params": {
    "lieu": "monde",
    "adoption": "courant",
    "calage": "mesures",
    "classe": "moyen",
    "outillage": "assistant",
    "raisonnement": "sans",
    "secteur": "services",
    "taille": "standard",
    "t_mot": 1.6,
    "t_consigne": 40,
    "t_question": 100,
    "t_reponse": 400,
    "t_email": 240,
    "t_page": 640,
    "t_article": 1600,
    "t_document": 19200,
    "t_roman": 128000,
    "t_tolkien": 768000,
    "t_minute_parole": 240,
    "t_reunion": 17600,
    "t_page_web": 1600,
    "t_extrait": 320,
    "t_image_lue": 1100,
    "t_minute_audio_lue": 600,
    "t_minute_audio_ecrite": 1200,
    "t_ligne_code": 12,
    "t_fonction": 480,
    "t_fichier_code": 3600,
    "t_tableur": 9300,
    "t_consigne_systeme": 500,
    "part_utilisateurs": 0.25,
    "k_calage": 0.6556
  },
  "perimetre": {
    "court": "usage personnel, gratuit ou par abonnement, centre de données compris",
    "compte": "l'usage personnel des 12 à 24 ans, gratuit ou par abonnement, centre de données compris",
    "non_compte": "les devoirs et les études, comptés avec les élèves et étudiants, le travail, les moins de 12 ans et la fabrication des serveurs et l'entraînement des modèles"
  },
  "recette": [
    {
      "id": "IA-0074",
      "designation": "Usage personnel gratuit, 1 an",
      "role": "entree",
      "quantite": 1218080,
      "unitaire_Wh": 748.967,
      "contribution_Wh": 912302000,
      "nature": "hypothese",
      "source": "eurostat-ia-2025",
      "note": "12 à 15 ans : 3,31 millions, 40 % utilisent l'IA pour eux-mêmes, 92 % sans abonnement payant",
      "adresse": "https://projetcelsius.com/ia/base/activites/usage-personnel-gratuit-1-an/"
    },
    {
      "id": "IA-0319",
      "designation": "ChatGPT Plus, 1 an",
      "role": "entree",
      "quantite": 105920,
      "unitaire_Wh": 3031.26,
      "contribution_Wh": 321071000,
      "nature": "hypothese",
      "source": "credoc-2026",
      "note": "12 à 15 ans, les 8 % d'utilisateurs personnels qui paient un abonnement",
      "adresse": "https://projetcelsius.com/ia/base/activites/chatgpt-plus-1-an/"
    },
    {
      "id": "IA-0074",
      "designation": "Usage personnel gratuit, 1 an",
      "role": "entree",
      "quantite": 3482060,
      "unitaire_Wh": 748.967,
      "contribution_Wh": 2607950000,
      "nature": "mesure",
      "source": "eurostat-ia-2025",
      "note": "16 à 24 ans : 7,4 millions, 51 % utilisent l'IA pour eux-mêmes",
      "adresse": "https://projetcelsius.com/ia/base/activites/usage-personnel-gratuit-1-an/"
    },
    {
      "id": "IA-0319",
      "designation": "ChatGPT Plus, 1 an",
      "role": "entree",
      "quantite": 302788,
      "unitaire_Wh": 3031.26,
      "contribution_Wh": 917829000,
      "nature": "hypothese",
      "source": "credoc-2026",
      "note": "16 à 24 ans, les 8 % d'utilisateurs personnels qui paient un abonnement",
      "adresse": "https://projetcelsius.com/ia/base/activites/chatgpt-plus-1-an/"
    }
  ],
  "lignage": [
    {
      "id": "IA-0074",
      "designation": "Usage personnel gratuit, 1 an",
      "etage": "activites",
      "quantite": 3482060,
      "contribution_Wh": 2607950000,
      "nature": "mesure",
      "fait_de": [
        {
          "id": "IA-0210",
          "designation": "Lire un aperçu généré par IA en tête d'une recherche",
          "etage": "taches",
          "quantite": 886005000,
          "contribution_Wh": 705396000,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0042",
              "designation": "Poser une question rapide",
              "etage": "taches",
              "quantite": 886005000,
              "contribution_Wh": 705396000,
              "nature": "hypothese"
            }
          ]
        },
        {
          "id": "IA-0047",
          "designation": "Créer un clip de 5 secondes",
          "etage": "taches",
          "quantite": 5610010,
          "contribution_Wh": 555403000,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0014",
              "designation": "Générer une seconde de vidéo",
              "etage": "machine",
              "quantite": 33323500,
              "contribution_Wh": 555403000,
              "nature": "mesure"
            }
          ]
        },
        {
          "id": "IA-0201",
          "designation": "Avoir une conversation de 10 échanges",
          "etage": "taches",
          "quantite": 126225000,
          "contribution_Wh": 444220000,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0021",
              "designation": "Écrire 1 000 tokens, avec l'effort de raisonnement",
              "etage": "machine",
              "quantite": 364115000,
              "contribution_Wh": 349550000,
              "nature": "convention"
            },
            {
              "id": "IA-0012",
              "designation": "Relire 1 000 tokens en cache",
              "etage": "machine",
              "quantite": 2048140000,
              "contribution_Wh": 65540600,
              "nature": "hypothese"
            },
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 91028700,
              "contribution_Wh": 29129200,
              "nature": "convention"
            }
          ]
        },
        {
          "id": "IA-0045",
          "designation": "Faire une recherche approfondie",
          "etage": "taches",
          "quantite": 3236550,
          "contribution_Wh": 320152000,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 373544000,
              "contribution_Wh": 119534000,
              "nature": "hypothese"
            },
            {
              "id": "IA-0012",
              "designation": "Relire 1 000 tokens en cache",
              "etage": "machine",
              "quantite": 3734510000,
              "contribution_Wh": 119504000,
              "nature": "hypothese"
            },
            {
              "id": "IA-0011",
              "designation": "Écrire 1 000 tokens",
              "etage": "machine",
              "quantite": 54150400,
              "contribution_Wh": 51984400,
              "nature": "hypothese"
            },
            {
              "id": "IA-0049",
              "designation": "Faire une recherche web classique (référence)",
              "etage": "taches",
              "quantite": 97096400,
              "contribution_Wh": 29128900,
              "nature": "hypothese"
            }
          ]
        },
        {
          "id": "IA-0042",
          "designation": "Poser une question rapide",
          "etage": "taches",
          "quantite": 984450000,
          "contribution_Wh": 295335000,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0011",
              "designation": "Écrire 1 000 tokens",
              "etage": "machine",
              "quantite": 283976000,
              "contribution_Wh": 272617000,
              "nature": "convention"
            },
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 70994000,
              "contribution_Wh": 22718100,
              "nature": "convention"
            }
          ]
        },
        {
          "id": "IA-0046",
          "designation": "Créer une image",
          "etage": "taches",
          "quantite": 28050100,
          "contribution_Wh": 89695700,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0013",
              "designation": "Générer une image",
              "etage": "machine",
              "quantite": 30855100,
              "contribution_Wh": 89695700,
              "nature": "mesure"
            }
          ]
        },
        {
          "id": "IA-0212",
          "designation": "Retoucher une photo",
          "etage": "taches",
          "quantite": 14025000,
          "contribution_Wh": 48537600,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0013",
              "designation": "Générer une image",
              "etage": "machine",
              "quantite": 15427500,
              "contribution_Wh": 44847900,
              "nature": "hypothese"
            },
            {
              "id": "IA-0017",
              "designation": "Analyser une image envoyée",
              "etage": "machine",
              "quantite": 10114300,
              "contribution_Wh": 3560230,
              "nature": "convention"
            },
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 404572,
              "contribution_Wh": 129463,
              "nature": "convention"
            }
          ]
        },
        {
          "id": "IA-0215",
          "designation": "Parler en mode vocal, 1 minute",
          "etage": "taches",
          "quantite": 70125200,
          "contribution_Wh": 43693800,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0011",
              "designation": "Écrire 1 000 tokens",
              "etage": "machine",
              "quantite": 30342900,
              "contribution_Wh": 29129200,
              "nature": "hypothese"
            },
            {
              "id": "IA-0012",
              "designation": "Relire 1 000 tokens en cache",
              "etage": "machine",
              "quantite": 303429000,
              "contribution_Wh": 9709720,
              "nature": "hypothese"
            },
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 15171400,
              "contribution_Wh": 4854860,
              "nature": "hypothese"
            }
          ]
        },
        {
          "id": "IA-0043",
          "designation": "Interroger un PDF de 30 pages",
          "etage": "taches",
          "quantite": 6473090,
          "contribution_Wh": 30623000,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 90095000,
              "contribution_Wh": 28830400,
              "nature": "convention"
            },
            {
              "id": "IA-0021",
              "designation": "Écrire 1 000 tokens, avec l'effort de raisonnement",
              "etage": "machine",
              "quantite": 1867250,
              "contribution_Wh": 1792560,
              "nature": "convention"
            }
          ]
        },
        {
          "id": "IA-0205",
          "designation": "Corriger ou reformuler une page",
          "etage": "taches",
          "quantite": 42075100,
          "contribution_Wh": 25245300,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0021",
              "designation": "Écrire 1 000 tokens, avec l'effort de raisonnement",
              "etage": "machine",
              "quantite": 19419400,
              "contribution_Wh": 18642700,
              "nature": "convention"
            },
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 20633200,
              "contribution_Wh": 6602610,
              "nature": "convention"
            }
          ]
        },
        {
          "id": "IA-0206",
          "designation": "Traduire une page",
          "etage": "taches",
          "quantite": 42075100,
          "contribution_Wh": 25245300,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0021",
              "designation": "Écrire 1 000 tokens, avec l'effort de raisonnement",
              "etage": "machine",
              "quantite": 19419400,
              "contribution_Wh": 18642700,
              "nature": "convention"
            },
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 20633200,
              "contribution_Wh": 6602610,
              "nature": "convention"
            }
          ]
        },
        {
          "id": "IA-0202",
          "designation": "Écrire un e-mail",
          "etage": "taches",
          "quantite": 70125200,
          "contribution_Wh": 16182900,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0021",
              "designation": "Écrire 1 000 tokens, avec l'effort de raisonnement",
              "etage": "machine",
              "quantite": 12137200,
              "contribution_Wh": 11651700,
              "nature": "convention"
            },
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 14160000,
              "contribution_Wh": 4531200,
              "nature": "hypothese"
            }
          ]
        },
        {
          "id": "IA-0218",
          "designation": "Générer une fonction",
          "etage": "taches",
          "quantite": 7012520,
          "contribution_Wh": 8220900,
          "nature": "hypothese",
          "fait_de": [
            {
              "id": "IA-0010",
              "designation": "Lire 1 000 tokens",
              "etage": "machine",
              "quantite": 18408000,
              "contribution_Wh": 5890570,
              "nature": "convention"
            },
            {
              "id": "IA-0021",
              "designation": "Écrire 1 000 tokens, avec l'effort de raisonnement",
              "etage": "machine",
              "quantite": 2427430,
              "contribution_Wh": 2330330,
              "nature": "convention"
            }
          ]
        }
      ]
    },
    {
      "id": "IA-0319",
      "designation": "ChatGPT Plus, 1 an",
      "etage": "activites",
      "quantite": 302788,
      "contribution_Wh": 917829000,
      "nature": "hypothese",
      "fait_de": [
        {
          "id": "IA-0045",
          "designation": "Faire une recherche approfondie",
          "etage": "taches",
          "quantite": 3149000,
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        {
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  ],
  "entre_dans": [
    {
      "id": "IA-0507",
      "designation": "France, 1 an",
      "adresse": "https://projetcelsius.com/ia/base/monde/france/"
    }
  ],
  "conventions": [
    {
      "code": "C5",
      "nom": "Le lieu par défaut",
      "regle": "Sans autre information, les serveurs sont dans le monde, à l'électricité moyenne mondiale",
      "valeur": "monde",
      "alternatives": "les États-Unis, où tournent la plupart des grands assistants"
    },
    {
      "code": "C7",
      "nom": "L'électricité, location-based, en cycle de vie",
      "regle": "Le kilowattheure est celui du pays des serveurs, en cycle de vie, d'une seule source pour tous les pays",
      "valeur": "Ember et Our World in Data, 2025",
      "alternatives": "market-based, avec les contrats d'achat, affiché à côté quand il est publié"
    },
    {
      "code": "C8",
      "nom": "Deux chiffres significatifs",
      "regle": "Une valeur calculée s'arrondit à deux chiffres significatifs, une valeur publiée est reprise avec la précision de sa source ; le calcul garde toute la précision",
      "valeur": "2 chiffres",
      "alternatives": ""
    }
  ],
  "releves": [],
  "adresses": {
    "page": "https://projetcelsius.com/ia/base/monde/moins-de-25-ans-en-france-usage-personnel/",
    "lien_court": "https://projetcelsius.com/ia/base/IA-0510/",
    "json": "https://projetcelsius.com/ia/base/monde/moins-de-25-ans-en-france-usage-personnel.json",
    "markdown": "https://projetcelsius.com/ia/base/monde/moins-de-25-ans-en-france-usage-personnel.md"
  },
  "licence": "CC BY 4.0",
  "citation": "Projet Celsius, Base Impact de l'IA, « Moins de 25 ans en France, usage personnel, 1 an », IA-0510, version 0.1, 2 novembre 2026, projetcelsius.com/ia/base/IA-0510/ · CC BY 4.0."
}