ChatGPT Model Selector

cgptmodelselect.user.js

// ==UserScript==
// @name        ChatGPT Model Override
// @namespace   SpaceSaver Scripts
// @match       https://chatgpt.com/*
// @grant       none
// @version     2.0
// @author      SpaceSaver UnderCover (/u/SpaceSaver2000-1)
// @description Adds a more advanced model selector to ChatGPT enabling you to save your GPT-4o credits for when you need them!
// @run-at      document-start
// ==/UserScript==
(() => {
  const HEADER_QUERY_STRING = "nav > .bottom-0";
  let models = null;
  const originalFetch = window.fetch;
  async function fetchInterceptor(...args) {
    if (!window.localStorage.getItem("selected-model")) {
      window.localStorage.setItem("selected-model", "gpt-4o-mini");
    }
    //args[0] = new String(args[0][0])
    if (typeof(args[0]) != "string") return originalFetch(...args);
    console.log(args[0]);
    if (args[0].endsWith("/backend-api/conversation") || args[0].endsWith("/backend-api/f/conversation") && args[1]?.body) {
      const bodyJSON = JSON.parse(args[1].body);
      bodyJSON.model = window.localStorage.getItem("selected-model");
      args[1].body = JSON.stringify(bodyJSON);
    /*} else if (args[0].split("?")[0].endsWith("/backend-api/models")) {
      const res = await originalFetch(...args);
      const textRes = await res.text();
      res.text = async () => {return textRes};
      res.json = async () => {return JSON.parse(textRes)};
      models = JSON.parse(textRes).models;
      setTimeout(() => loadMenu(), 30000);
      return res;
      */
    } else if (args[0].endsWith("/backend-api/conversation/init") && args[1]?.body) {
      return
      //If we do this it doesn't acknowledge that certain chats are disabled since 4o ratelimit has been reached 💀
      /*
      const res = await originalFetch(...args);
      let textRes = await res.text();
      textRes = JSON.parse(textRes);
      if (textRes.blocked_features && textRes.blocked_features.filter(elem => {return elem.name == "send"}).length > 0) {
          const newBlocked = [];
          for (let x = 0; x < textRes.blocked_features.length; x++) {
              if (textRes.blocked_features[x].name != "send") {
                  newBlocked.push(textRes.blocked_features[x]);
              }
          }
          textRes.blocked_features = newBlocked;
      }
      console.log(textRes);
      textRes = JSON.stringify(textRes);
      res.text = async () => {return textRes};
      res.json = async () => {return JSON.parse(textRes)};
      */
    }
    return await originalFetch(...args);
  }
  window.fetch = fetchInterceptor;
  window.addEventListener("load",() => setTimeout( async () => {
      console.log("Getting sh*t myself")
      const headers = {};
      try {
          headers.Authorization = "Bearer " + document.documentElement.innerHTML.split('\\"accessToken\\",\\"')[1].split('\\"')[0]//window.__reactRouterContext.state.loaderData.root.clientBootstrap.session.accessToken;
      } catch(e) {
          console.log("Couldn't find token, probably logged out lol.")
      }
      models = (await ( await fetch("https://chatgpt.com/backend-api/models", {headers, credentials: "include"})).json()).models;
      loadMenu();
  }, 5000));
  const loadMenu = () => {
    const header = document.querySelector(HEADER_QUERY_STRING);
    const selector = document.createElement("select");
    for (const model of models) {
      const opt = document.createElement("option");
      opt.textContent = model.title;
      opt.value = model.slug;
      selector.appendChild(opt);
    }
    selector.style.backgroundColor = "var(--sidebar-surface-primary)";
    selector.style.borderRadius = "15px";
    selector.value = window.localStorage.getItem("selected-model");
    selector.addEventListener("change", e => {
      window.localStorage.setItem("selected-model", e.target.value);
    });
    header.insertBefore(selector, header.children[header.children.length - 1]);
  }
})();