How-to · ChatGPT for Mac
How to change the model in ChatGPT on Mac: steps for the 2026 desktop app
In the ChatGPT Mac app, click the active tier name at the top of a conversation, then pick Instant, Thinking, or Pro from the flyout. If the choice keeps snapping back to Auto, open Configure, turn Auto off, and choose your model again before you type.
Quick answer
- Click the active tier name at the top of the chat (Instant, Thinking, or Pro) to open the flyout.
- For a fixed model, open Configure at the base of the flyout and turn Auto off.
- If the picker snaps back to Auto, turn Auto off before you type, or use the web app.
- No verified Mac shortcut switches models. Option+Space opens Quick Chat, which some users use to switch.
What you need
- A ChatGPT account, signed in on your Mac
- The ChatGPT Mac app, or a browser for the web fallback
- A plan with model choice. Check chatgpt.com/pricing, since picker access by plan is not confirmed
- Time to send one short test prompt after each change
How to Change the model in ChatGPT on a Mac in ChatGPT on a Mac
Open ChatGPT on your Mac
Open the ChatGPT app from Applications. If the app you open is called ChatGPT Classic, the older app, expect small differences in the menus.
Tip: Compare the app name in Applications with the name on this page before you start.
Open a conversation
The model picker sits at the top of a conversation, not in the message box. Open an existing chat or start a new one, then look at the top edge of the chat window.
Click the active tier name
Find the active tier name at the top of the conversation. It reads Instant, Thinking, or Pro. Click that name to open the flyout menu.
Tip: The name you see is the tier that is active right now, so it is also your check later.
Pick a tier in the flyout
Click Instant, Thinking, or Pro in the flyout. Which tiers appear depends on your subscription, according to The Decoder. If a tier does not appear, your plan may not include it.
Open Configure at the base of the flyout
Scroll to the bottom of the flyout and open Configure. The Auto setting lives in this section, according to The Decoder and Layer3labs.
Turn Auto off for a fixed mode
Switch Auto off in Configure before you type your first message. Layer3labs recommends this step for the picker that reverts to Auto.
Tip: Set this before your first prompt, not after.
Choose a specific version for an exact model
To pick a checkpoint instead of a tier, open the version sub-menu. The Decoder described a Latest option and named versions in March 2026. Version names change, so trust the list in your app over any article, including this one.
Read the model name at the top again
After you choose, look at the top of the conversation again. If the name reads Auto when you expected a tier, the change did not stick. Go to the troubleshooting section below.
Send a short test prompt
Type one short question and send it. Check the name at the top again after the reply. The sources do not say how a switch applies to a chat that is already open, so test in a new chat first.
Use Quick Chat if the main window fails
⌥ Space
Press Option Space to open Quick Chat. Users report that its model picker can switch models while the main window stays stuck. Leave Quick Chat in its own window, because moving it into the main window reverts the choice to Auto.
Switch to the web app as a fallback
Open ChatGPT in a browser and change the model there. Users say the web version works when the Mac app keeps resetting. Treat this as a workaround, not a fix, and check the model name before you send each prompt.
Check which ChatGPT app you have on your Mac
Start by checking which app is open, because the menus depend on it. OpenAI's support reply in a developer forum says the older Mac app is now called ChatGPT Classic. It also says a newer desktop app exists. The download page at chatgpt.com/download lists ChatGPT and Codex, and it does not mention Classic at all.
Open Finder, go to Applications, and check the name of the app you use. Most picker reports cite build 1.2026.183, which started on July 11, 2026. One user says 1.2026.184 still has the problem. If your build is different, the bug may not appear for you, and the menus may still differ.
This page is built from a third-party guide, a news site, and user reports in OpenAI's forum. OpenAI's help center blocked every attempt to read its own article on the Mac picker. Treat the steps below as a strong starting point, and check them against your screen.
What Instant, Thinking, and Pro mean in the picker
In March 2026, OpenAI changed how ChatGPT selects models, according to The Decoder. The picker now has three tiers: Instant, Thinking, and Pro. Which tiers you can choose depends on your subscription.
The Decoder also described a dropdown for a specific version, with an option named Latest. At the time it listed versions such as 5.4, 5.2, 5.0, and o3. Those names are a snapshot from March 2026. The pricing page now lists newer names, such as GPT-6.1 Sol on Plus and GPT-5.6 Sol Pro on Pro, so read the list in your own app.
How Configure and Auto work together
Configure sits at the base of the flyout, and the Auto setting lives there. Auto is the option that lets ChatGPT choose the tier for you. Layer3labs describes turning Auto off to get a fixed mode. That is what you want when you pick a model on purpose.
A fixed mode has one catch. The picker can still revert, so check the active tier name at the top of the chat after each change. If it reads Auto, your choice did not stick, and the troubleshooting section covers that case.
Why the model picker snaps back to Auto on Mac
A bug report thread on the OpenAI Developer Community says the legacy Mac app, ChatGPT Classic, resets the picker to Auto right after you choose another model. Most reports cite build 1.2026.183. No official fix appears in the thread.
Users in that thread say the web version works. One user said that switching to the web, using the /Thinking command, and then choosing 5.1 sort of solved it. Another found that a Quick Chat picker opened with Option+Space could switch models while the main window stayed stuck. Moving Quick Chat into the main window reverted to Auto. These are user workarounds, not confirmed fixes.
Keyboard shortcuts for changing the model in ChatGPT
There is no verified keyboard shortcut for switching models on Mac. Users who tried Cmd+K and Ctrl+Shift+M reported that neither did anything. Do not spend time hunting for a shortcut the sources do not support.
The shortcut that matters is Option+Space. It opens Quick Chat, a small window. Users say its picker can switch models, which helps when the main window will not hold a change. For setup details, read how to use the Option+Space shortcut in ChatGPT on Mac.
The thinking effort selector on Mac and the Work app slider
Some people look for a reasoning effort control in the Mac app and cannot find it. A thread from April 27, 2026 reports that the thinking effort selector does not show for Pro or Thinking models. That user was on ChatGPT 1.2026.104 running macOS Tahoe 26.4.1, and said the control appears on the web and on iOS.
An OpenAI support reply dated September 7, 2026 says the parity feedback was passed along, with no timeline. It points to a separate help article for reasoning controls. Until the Mac app matches the web, change the effort level in the web app.
OpenAI's developer docs describe a different control for the desktop app for Work or Codex. You use a model and reasoning control under the composer, and open Advanced to choose a specific model, effort, or speed. The presets are Power, Smarter, and Faster, and the Left and Right arrow keys move the slider. The docs give no Mac-specific steps. If you see that slider, you are in the Work or Codex picker, not the ChatGPT one on this page.
To show Ultra in that slider, the docs say to go to Settings > Configuration and turn on Ultra in model picker slider. If you do not see Max, check your app settings, the docs add.
Check your plan before you hunt for the picker
Not every account sees the same options. The Decoder says tier availability depends on subscription. Layer3labs says a free account may have only one engine, and admin tier limits can hide options in a work account. The pricing page at chatgpt.com/pricing lists models per plan, but it does not say how the picker shows on each plan. Plan prices were blank in the text I could read, so check the live page yourself.
A worked example: one fixed model for a long afternoon
Say you spend an afternoon reviewing a long report, and you want the same tier all day. Open the chat, click the active tier name, and open Configure. Turn Auto off, then pick the tier you need. Send one short test prompt, and check the name at the top before you paste in the report.
Now say the name changes back to Auto after the reply. Do not keep typing into a chat that has reset. Sign out and back in, as Layer3labs suggests, then repeat the steps. If it still resets, move that session to the web app and check the model name there before you continue.
Mistakes people make when they change the model
- Typing before you turn Auto off. Change the setting first, then send your prompt.
- Trusting an old model list. The version names in The Decoder are from March 2026, and newer names now appear on the pricing page.
- Expecting an update from the Mac App Store. Layer3labs says to update that way, but the download page links no Mac App Store page.
- Moving Quick Chat into the main window. Users report that move reverts the choice to Auto.
- Looking for a keyboard shortcut. None is verified, and Cmd+K and Ctrl+Shift+M reportedly do nothing.
Edge cases: free plans, work accounts, and missing menus
Three edge cases catch people. A free account may have one model option. A work account may have admin limits that hide tiers. A missing menu is not always a broken app, so check your plan before you reinstall anything.
Do not replace the installed app to bring back an older menu. Unofficial guides describe restoring ChatGPT Classic by swapping the app file. Those guides are not from OpenAI, and the sources here do not verify them.
When the Mac picker still will not hold
Start with the web app at chatgpt.com. If the picker holds there, the problem sits in the Mac app, not in your account. Reports say the web version works while the Mac app resets, so compare the model name in both before you decide.
If the Mac app still resets, sign out and sign back in, as Layer3labs suggests. Then check the build number in Applications. Reports from July 2026 mention 1.2026.183 and 1.2026.184, so a different build may behave differently.
Why this matters beyond one menu
44%
of U.S. adults say they ever use ChatGPT, Pew survey fielded February 17 to 23, 2026
ChatGPT tops the list of chatbots Americans use, across age groupsA Pew survey fielded from February 17 to 23, 2026 found that 44% of U.S. adults say they ever use ChatGPT. Wikipedia, a secondary source here, reports 900 million weekly active users in February 2026. Many people use the app, so a picker bug affects a lot of readers.
Related ChatGPT guides for Mac
If you are setting up the app, read how to set custom instructions in ChatGPT on Mac next. For spoken prompts, see how to use voice mode in ChatGPT on Mac. Check each guide's app name against the one on your Mac.
ChatGPT shortcuts for this on Mac
| To do this | Press |
|---|---|
| Open Quick Chat, where users report model switching can work | ⌥ Space |
| Switch models from the keyboard (no verified shortcut) | None verified |
If it does not work
- The picker snaps back to Auto after I choose a model.
- Turn Auto off in Configure before you type, then sign out and back in, as Layer3labs suggests. Reports from July 2026 mention builds 1.2026.183 and 1.2026.184. If it still resets, use the web app for that work.
- I can't find the thinking effort selector in the Mac app.
- A user reported it missing on macOS for Pro and Thinking models in April 2026. OpenAI support said on September 7, 2026 that the feedback was passed on, with no timeline. Use the web app, where that report says the control exists.
- I only see Instant, not Thinking or Pro.
- Tier availability depends on your subscription, according to The Decoder. Check the pricing page at chatgpt.com/pricing. If you use a work account, ask whoever manages it, because admin limits can hide tiers.
- My app is called ChatGPT Classic and the menus look different.
- OpenAI support says the older Mac app is now called ChatGPT Classic, and a newer desktop app exists. Follow the steps that match your screen, and use the active tier name at the top of the chat as your anchor.
- I can't find an update on the Mac App Store.
- Layer3labs says to update through the Mac App Store, but the download page does not link a Mac App Store page. Download the current app from chatgpt.com/download instead.
- Cmd+K does nothing when I try to change the model.
- Users reported that Cmd+K and Ctrl+Shift+M did nothing. Use the active tier name at the top of the chat, or the Option+Space Quick Chat window.
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You say“Where do I change the model in ChatGPT on this Mac?”
Lazur · points at itLazur circles the active tier name and labels it, so you can find it fast. Lazur points and answers out loud. It does not click the button or change the model for you.
Questions people ask
Where is the model picker in ChatGPT on Mac?
Look at the top of the conversation for the active tier name, such as Instant, Thinking, or Pro. Click it to open the flyout. The Configure section at the base holds the Auto setting. What you see depends on your plan.
Why does ChatGPT keep switching back to Auto on my Mac?
User reports on the OpenAI Developer Community describe the picker resetting to Auto after a choice, mostly on build 1.2026.183 from July 2026. Turn Auto off in Configure before you type. No official fix appears in that thread.
Is there a keyboard shortcut to change the model in ChatGPT on Mac?
No verified shortcut exists in the sources used here. Users report that Cmd+K and Ctrl+Shift+M do nothing. Option+Space opens Quick Chat, which users say can switch models, but moving it into the main window reverts to Auto.
Why can't I see Thinking or Pro in my ChatGPT Mac app?
The Decoder says tier availability depends on your subscription. A free account may have one option, and a work account can have admin limits. Check your plan on chatgpt.com/pricing, and ask your admin if your account is managed.
Does the ChatGPT Mac app have the thinking effort selector?
A user reported in April 2026 that it was missing on Mac for Pro and Thinking models, while web and iOS had it. OpenAI support said in September 2026 that the feedback was passed on, with no timeline. Use the web app for effort settings.
What is ChatGPT Classic?
OpenAI support says the older Mac app is now called ChatGPT Classic, and a newer desktop app exists. Check the app name in Applications, because the menus in this guide can differ between the two.
Should I use the web app instead of the Mac app?
If the Mac picker keeps resetting, yes, as a short-term workaround. Users report that the web version works while the Mac app resets. It is a workaround, not a fix, so check the model name before each prompt.
Sources
- ChatGPT Model Picker Missing: Where It Went (2026) · Layer3labs · checked 2026-11-09
- OpenAI overhauls ChatGPT's model selection · The Decoder · checked 2026-11-09
- I can't switch models at all in ChatGPT Classic macOS (Constant reset to 'Auto') · OpenAI Developer Community · checked 2026-11-09
- Thinking effort selector missing in ChatGPT for macOS · OpenAI Developer Community · checked 2026-11-09
- Models, ChatGPT and Codex docs · OpenAI · checked 2026-11-09
- Download ChatGPT · OpenAI · checked 2026-11-09
- ChatGPT Pricing · OpenAI · checked 2026-11-09
- ChatGPT tops the list of chatbots Americans use, across age groups · Pew Research Center · checked 2026-11-09
- ChatGPT, Wikipedia · Wikipedia · checked 2026-11-09
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