OpenAI Chat GPT-4o enforce

enforce.js

// ==UserScript==
// @name        OpenAI Chat GPT-4o enforce
// @version     1
// @grant       none
// @description This script enforces the GPT-4o model on the OpenAI Chat website
// @match       https://chatgpt.com/*
// @run-at      document-end
// ==/UserScript==

(function() {
    // Store a reference to the original JSON.stringify function
    const originalStringify = JSON.stringify;

    // Override JSON.stringify
    JSON.stringify = function(data, ...args) {
        if(isChatMessage(data)) {
            data.model = 'gpt-4o';
        }
        
        // Call the original JSON.stringify function
        return originalStringify.apply(JSON, [data, ...args]);
    };
})();

function isChatMessage(data) {
    return data.action === 'next' && data.messages && data.messages.length > 0 && data.model;
}