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OpenAI API · Forced move · Announced April 22, 2026 · Sources checked Oct 13

Time to bail on OpenAI gpt-4, gpt-3.5-turbo, o1, o3-mini, o4-mini?

Time to Bail · Boarding pass

FromOpenAI gpt-4, gpt-3.5-turbo, o1, o3-mini, o4-mini
ToYour pick

Act. You can stay.

These models shut down on October 23, 2026. Change the model name in your code first.[1]

Act means: change a setting or plan before the date. You can stay.

Gate closes
Shutdown date
Time left
8days
Status
Act

OpenAI shuts down gpt-4, gpt-3.5-turbo, o1 and o4-mini on October 23

OpenAI shuts down a set of older API models on October 23, 2026, including gpt-4, gpt-3.5-turbo, o1, o3-mini and o4-mini. Apps that call them must change the model name.

How it is winding down

  1. Apr 22AnnouncedDone
  2. Oct 23Shutdown dateNext

What to do before October 23

Tick steps as you go. Your progress stays in this browser.

  1. Search your code for old model names

    Look for gpt-4, gpt-3.5-turbo, gpt-4-turbo, o1, o3-mini, o4-mini and gpt-image-1. Check plugins and no-code tools too.

  2. Switch to the named replacement

    Most go to gpt-5.6-sol or gpt-5.6-terra. gpt-4.1-nano goes to gpt-5.6-luna.

  3. Test prompts and cost

    Run your usual prompts on the new model. Check output, speed and price before October 23.

Facts we checked

Facts and their sources
Shutdown dateOctober 23, 2026[1]
Models that shut downgpt-3.5-turbo, gpt-4, gpt-4-1106-preview, gpt-4-turbo, gpt-4.1-nano, gpt-4o-2024-05-13, gpt-image-1, o1, o1-pro, o3-mini, o4-mini[1]
Replacementgpt-5.6-sol replaces gpt-4, gpt-4-1106-preview, gpt-4-turbo, gpt-4o-2024-05-13, o1, o1-pro and o3-mini[1]
Replacementgpt-5.6-terra replaces gpt-3.5-turbo and o4-mini[1]
Replacementgpt-5.6-luna replaces gpt-4.1-nano[1]
Replacement for gpt-image-1gpt-image-2.5-sunburst or gpt-image-2.5-flare[1]
Fine-tuned models also shut downThose built on gpt-3.5-turbo, gpt-4, gpt-4.1-nano, o4-mini, babbage-002 and davinci-002[1]
After shutdownThe model can no longer be accessed[1]
AnnouncedApril 22, 2026[1]
Apps that call these modelsStop working on October 23, 2026[1]

Sources

Check it yourself. Every fact above links here.

  1. OpenAI API deprecations OpenAI · primary · checked Oct 13
Read the published editorial report

What changed

Time to bail on OpenAI gpt-4, gpt-3.5-turbo, o1, o3-mini, o4-mini? Act. You can stay. These models shut down on October 23, 2026. Change the model name in your code first.

On our scale this is Act: change a setting or plan before the date. You can stay.

OpenAI shuts down a set of older API models on October 23, 2026, including gpt-4, gpt-3.5-turbo, o1, o3-mini and o4-mini. Apps that call them must change the model name.

Here are the facts we checked:

  • Shutdown date: October 23, 2026 (OpenAI)
  • Models that shut down: gpt-3.5-turbo, gpt-4, gpt-4-1106-preview, gpt-4-turbo, gpt-4.1-nano, gpt-4o-2024-05-13, gpt-image-1, o1, o1-pro, o3-mini, o4-mini (OpenAI)
  • Replacement: gpt-5.6-sol replaces gpt-4, gpt-4-1106-preview, gpt-4-turbo, gpt-4o-2024-05-13, o1, o1-pro and o3-mini (OpenAI)
  • Replacement: gpt-5.6-terra replaces gpt-3.5-turbo and o4-mini (OpenAI)
  • Replacement: gpt-5.6-luna replaces gpt-4.1-nano (OpenAI)
  • Replacement for gpt-image-1: gpt-image-2.5-sunburst or gpt-image-2.5-flare (OpenAI)
  • Fine-tuned models also shut down: Those built on gpt-3.5-turbo, gpt-4, gpt-4.1-nano, o4-mini, babbage-002 and davinci-002 (OpenAI)
  • After shutdown: The model can no longer be accessed (OpenAI)
  • Announced: April 22, 2026 (OpenAI)
  • Apps that call these models: Stop working on October 23, 2026 (OpenAI)

You can stay on OpenAI API. You have to change a setting or plan before the date.

Leaving is a choice here, not a must.

OpenAI is the main source for this page. OpenAI API has not said more than what is listed here. If a fact is not on this page, we do not know it yet.

Who is affected

Apps that call these models: Stop working on October 23, 2026.

The date to remember is October 23, 2026. Make the change before then.

What to do before October 23

  1. Search your code for old model names. Look for gpt-4, gpt-3.5-turbo, gpt-4-turbo, o1, o3-mini, o4-mini and gpt-image-1. Check plugins and no-code tools too.
  2. Switch to the named replacement. Most go to gpt-5.6-sol or gpt-5.6-terra. gpt-4.1-nano goes to gpt-5.6-luna.
  3. Test prompts and cost. Run your usual prompts on the new model. Check output, speed and price before October 23.

A few tips:

  • Make the change yourself before the date. Do not wait for the last reminder email.
  • Write down your current plan or settings first, so you can compare after the change.
  • After the change, open your settings again and check that it worked.

How to tell your users

If the change affects your members or team, send one short email. Say what changes for them and when. Put the most important line first.

If there is a date, send a short reminder a few days before it. Keep a copy of the list you sent it to.

Options people mention

Listed for convenience. Not ranked. Not paid. These names come up in threads and reviews; that does not show where people moved.

Before you pay, check the price page of each tool yourself. Prices change, and we only list what our sources say.

Questions people ask

No questions collected yet.

Sources

Thanks.

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