Force ChatGPT to use GPT3

force-gpt3.user.js

// ==UserScript==
// @name        Force GPT3
// @namespace   altbdoor
// @match       https://chatgpt.com/*
// @grant       none
// @version     1.1
// @author      altbdoor
// @run-at      document-start
// @updateURL   https://gist.github.com/altbdoor/ff538bc6b411583fdc500750e7faff04/raw/force-gpt3.user.js
// @downloadURL https://gist.github.com/altbdoor/ff538bc6b411583fdc500750e7faff04/raw/force-gpt3.user.js
// @supportURL  https://gist.github.com/altbdoor/ff538bc6b411583fdc500750e7faff04#new_comment_field
// ==/UserScript==

// https://blog.logrocket.com/intercepting-javascript-fetch-api-requests-responses/
const originalFetch = unsafeWindow.fetch;

unsafeWindow.fetch = async (url, config) => {
  if (url.includes("/backend-api/conversation") && config.method === "POST") {
    try {
      const body = JSON.parse(config.body);
      config.body = JSON.stringify({
        ...body,
        model: "text-davinci-002-render-sha",
      });
    } catch (error) {
      console.error("Error parsing JSON body:", error);
    }
  }

  const response = await originalFetch(url, config);
  return response;
};

Moved to https://github.com/altbdoor/userscripts/blob/master/force-gpt3.user.js