A menu that allows you to switch models during a single conversation
// ==UserScript==
// @name ChatGPT Realtime Model Switcher: 4o-mini, o4-mini, o3 and more!
// @namespace http://tampermonkey.net/
// @version 0.52.3
// @description A menu that allows you to switch models during a single conversation
// @match *://chatgpt.com/*
// @author d0gkiller87
// @license MIT
// @grant unsafeWindow
// @grant GM.getValue
// @grant GM.setValue
// @grant GM_registerMenuCommand
// @grant GM.unregisterMenuCommand
// @run-at document-idle
// @icon https://www.google.com/s2/favicons?sz=64&domain=chatgpt.com
// ==/UserScript==
(async function() {
'use strict';
function injectStyle( style, isDisabled = false ) {
const styleNode = document.createElement( 'style' );
styleNode.type = 'text/css';
styleNode.textContent = style;
document.head.appendChild( styleNode );
styleNode.disabled = isDisabled;
return styleNode;
}
class ModelSwitcher {
getPlanType() {
for ( const scriptNode of document.querySelectorAll( 'script' ) ) {
let match;
while ( ( match = /\\"planType\\"\s*,\s*\\"(\w+?)\\"/.exec( scriptNode.innerHTML ) ) !== null ) {
return match[1];
}
}
return 'free'
}
async init() {
this.model = await GM.getValue( 'model', 'auto' );
this.buttons = {};
this.offsetX = 0;
this.offsetY = 0;
this.isDragging = false;
this.shouldCancelClick = false;
this.modelSelector = null;
this.isMenuVisible = await GM.getValue( 'isMenuVisible', true );
this.isMenuVisibleCommandId = null;
this.modelHighlightStyleNode = null;
this.isModelHighlightEnabled = await GM.getValue( 'isModelHighlightEnabled', true );
this.isModelHighlightEnabledCommandId = null;
const planType = this.getPlanType();
const models = [
// [ "pro", "o1", "o1" ], // retired
[ "pro", "o1-pro", "o1-pro" ],
// [ "free", "o3-mini", "o3-mini" ], // retired
[ "plus", "o3", "o3" ],
[ "free", "o4-mini", "o4-mini" ],
[ "plus", "o4-mini-high", "o4-mini-high" ],
[ "free", "gpt-3.5", "gpt-3-5" ],
[ "free", "4o-mini", "gpt-4o-mini" ],
// [ "free", "gpt-4", "gpt-4" ], // same as 4o
[ "free", "gpt-4o", "gpt-4o" ],
// [ "plus", "4o-jawbone", "4o-jawbone" ], // retired (https://x.com/testingcatalog/status/1915483050953125965)
[ "plus", "gpt-4.5", "gpt-4-5" ],
[ "free", "default", "auto" ],
];
this.availableModels = {};
for ( const [ minimumPlan, modelName, modelValue ] of models ) {
if ( planType === minimumPlan ) {
this.availableModels[modelName] = modelValue;
}
}
}
hookFetch() {
const originalFetch = unsafeWindow.fetch;
unsafeWindow.fetch = async ( resource, config = {} ) => {
if (
resource === 'https://chatgpt.com/backend-api/conversation' &&
config.method === 'POST' &&
config.headers &&
config.headers['Content-Type'] === 'application/json' &&
config.body
) {
const body = JSON.parse( config.body );
body.model = this.model;
config.body = JSON.stringify( body );
}
return originalFetch( resource, config );
};
}
injectToggleButtonStyle() {
let style = `
#model-selector {
position: absolute;
background-color: rgba(0, 0, 0, 0.1);
color: white;
padding: 10px;
border-radius: 10px;
display: flex;
flex-direction: column;
gap: 6px;
z-index: 9999;
cursor: grab;
}
#model-selector.hidden {
display: none;
}
#model-selector button {
background: none;
border: 1px solid white;
color: white;
padding: 6px;
cursor: pointer;
font-size: 0.9rem;
user-select: none;
}
:root {
--o1-pro-color: 139, 232, 27;
--o3-color: 139, 232, 27;
--gpt-3-5-color: 0, 106, 129;
--gpt-4-5-color: 126, 3, 165;
--gpt-4o-color: 18, 45, 134;
--o4-mini-high-color: 176, 53, 0;
--o4-mini-color: 203, 91, 0;
--gpt-4o-jawbone-color: 201, 42, 42;
--gpt-4o-mini-color: 67, 162, 90;
--auto-color: 131, 131, 139;
--unknown-model-btn-color: 67, 162, 90;
--unknown-model-box-shadow-color: 48, 255, 19;
}
`;
for ( const model of Object.values( this.availableModels ) ) {
style += `
#model-selector button.btn-${ model } {
background-color: rgb(var(--${ model }-color, var(--unknown-model-btn-color)));
}
`;
}
injectStyle( style );
}
refreshButtons() {
for ( const [ model, button ] of Object.entries( this.buttons ) ) {
const isSelected = model === `btn-${ this.model }`;
button.classList.toggle( model, isSelected );
button.classList.toggle( 'selected', isSelected );
}
}
async reloadMenuVisibleToggle() {
this.isMenuVisibleCommandId = await GM.registerMenuCommand(
`${ this.isMenuVisible ? '☑︎' : '☐' } Show model selector`,
async () => {
this.isMenuVisible = !this.isMenuVisible;
await GM.setValue( 'isMenuVisible', this.isMenuVisible );
this.modelSelector.classList.toggle( 'hidden', !this.isMenuVisible );
this.reloadMenuVisibleToggle();
},
this.isMenuVisibleCommandId ? { id: this.isMenuVisibleCommandId } : {}
);
}
injectMessageModelHighlightStyle() {
let style = `
div[data-message-model-slug] {
padding: 0px 5px;
box-shadow: 0 0 3px 3px rgba(var(--unknown-model-box-shadow-color), 0.65);
}
`;
for ( const model of Object.values( this.availableModels ) ) {
style += `
div[data-message-model-slug="${ model }"] {
box-shadow: 0 0 3px 3px rgba(var(--${ model }-color, var(--unknown-model-box-shadow-color)), 0.8);
}
`;
}
this.modelHighlightStyleNode = injectStyle( style, !this.isModelHighlightEnabled );
}
async reloadMessageModelHighlightToggle() {
this.isModelHighlightEnabledCommandId = await GM.registerMenuCommand(
`${ this.isModelHighlightEnabled ? '☑︎' : '☐' } Show model identifer`,
async () => {
this.isModelHighlightEnabled = !this.isModelHighlightEnabled;
await GM.setValue( 'isModelHighlightEnabled', this.isModelHighlightEnabled );
this.modelHighlightStyleNode.disabled = !this.isModelHighlightEnabled;
this.reloadMessageModelHighlightToggle();
},
this.isModelHighlightEnabledCommandId ? { id: this.isModelHighlightEnabledCommandId } : {}
);
}
createModelSelectorMenu() {
this.modelSelector = document.createElement( 'div' );
this.modelSelector.id = 'model-selector';
for ( const [ modelName, modelValue ] of Object.entries( this.availableModels ) ) {
const button = document.createElement( 'button' );
button.textContent = modelName;
button.title = modelValue;
button.addEventListener(
'click',
async event => {
if ( this.shouldCancelClick ) {
event.preventDefault();
event.stopImmediatePropagation();
return;
}
this.model = modelValue;
await GM.setValue( 'model', modelValue );
this.refreshButtons();
}
);
this.modelSelector.appendChild( button );
this.buttons[`btn-${ modelValue }`] = button;
}
this.modelSelector.classList.toggle( 'hidden', !this.isMenuVisible );
return this.modelSelector;
}
injectMenu() {
document.body.appendChild( this.modelSelector );
}
monitorBodyChanges() {
const observer = new MutationObserver( mutationsList => {
for ( const mutation of mutationsList ) {
if ( document.body.querySelector( '#model-selector' ) ) continue;
this.injectMenu();
break;
}
});
observer.observe( document.body, { childList: true } );
}
getDefaultMenuPosition() {
return {
left: ( window.innerWidth - this.modelSelector.offsetWidth - 33 ) + 'px',
top: ( window.innerHeight - this.modelSelector.offsetHeight - 36 ) + 'px'
};
}
async restoreMenuPosition() {
const menuPosition = await GM.getValue( 'menuPosition', this.getDefaultMenuPosition() );
this.modelSelector.style.left = menuPosition.left;
this.modelSelector.style.top = menuPosition.top;
}
async registerResetMenuPositionCommand() {
await GM.registerMenuCommand(
'⟲ Reset menu position',
async () => {
const defaultMenuPosition = this.getDefaultMenuPosition();
this.modelSelector.style.left = defaultMenuPosition.left;
this.modelSelector.style.top = defaultMenuPosition.top;
await GM.setValue( 'menuPosition', defaultMenuPosition );
}
);
}
getPoint( event ) {
return event.touches ? event.touches[0] : event;
}
mouseDownHandler( event ) {
const point = this.getPoint( event );
this.offsetX = point.clientX - this.modelSelector.offsetLeft;
this.offsetY = point.clientY - this.modelSelector.offsetTop;
this.isDragging = true;
this.shouldCancelClick = false;
this.modelSelector.style.cursor = 'grabbing';
}
mouseMoveHandler( event ) {
if ( !this.isDragging ) return;
const point = this.getPoint( event );
const oldLeft = this.modelSelector.style.left;
const oldTop = this.modelSelector.style.top;
this.modelSelector.style.left = ( point.clientX - this.offsetX ) + 'px';
this.modelSelector.style.top = ( point.clientY - this.offsetY ) + 'px';
if ( this.modelSelector.style.left != oldLeft || this.modelSelector.style.top != oldTop ) {
this.shouldCancelClick = true;
}
// Prevent scrolling on touch
if ( event.cancelable ) event.preventDefault();
}
async mouseUpHandler( event ) {
this.isDragging = false;
this.modelSelector.style.cursor = 'grab';
document.body.style.userSelect = '';
await GM.setValue(
'menuPosition',
{
left: this.modelSelector.style.left,
top: this.modelSelector.style.top
}
);
}
registerGrabbing() {
// Mouse
this.modelSelector.addEventListener( 'mousedown', this.mouseDownHandler.bind( this ) );
document.addEventListener( 'mousemove', this.mouseMoveHandler.bind( this ) );
document.addEventListener( 'mouseup', this.mouseUpHandler.bind( this ) );
// Touch
this.modelSelector.addEventListener( 'touchstart', this.mouseDownHandler.bind( this ), { passive: false } );
document.addEventListener( 'touchmove', this.mouseMoveHandler.bind( this ), { passive: false } );
document.addEventListener( 'touchend', this.mouseUpHandler.bind( this ) );
}
}
const switcher = new ModelSwitcher();
await switcher.init();
switcher.hookFetch();
switcher.injectToggleButtonStyle();
switcher.injectMessageModelHighlightStyle();
switcher.createModelSelectorMenu();
await switcher.registerResetMenuPositionCommand();
await switcher.reloadMenuVisibleToggle();
await switcher.reloadMessageModelHighlightToggle();
switcher.refreshButtons();
switcher.monitorBodyChanges();
switcher.injectMenu();
await switcher.restoreMenuPosition();
switcher.registerGrabbing();
})();