O3 is non-functional for paying customers before its sunset date. See below for how to (easily) submit a complaint with evidence #FixO3 #NotYetO3Sunset

"Understood that other Plus users are reporting the same behavior; I can’t confirm scope from Reddit alone, but we can investigate this as a potential service-side o3 issue once we have a few concrete examples (timestamps/timezone + HAR + console errors) to correlate to backend logs." Support@openAI.com ](mailto: Support@openAI.com ) sent this morning, 8/14/26, in response to my complaint that O3 has been non-functional since 8/10. It is good news that they can investigate this as a service issue once they have concrete examples. So, please join me in gathering and sending them the evidence they need to investigate. Read on for how. To make this as convenient for everyone as possible,b I've included a draft email below that you can send, and outllned how to gather the requisite timestamps and HAR files.

O3 is a fantastic model, and the last one with the DNA of the 4-series family. This untimely non-functionality is a blow to paying users. It was assigned a sunset date of August 26th. Not August 10th! August 26th. The many people who depend on this model and its unique attributes, and who retain Plus subscriptions for access to it, deserve the full promised term to finish up their projects and transfer workflows.

The problem:

Since at least August 10th, O3 responses generate partially, fail to generate entirely, and/or generate without UI controls. In all cases, all responses disappear with thread refresh. This is prompt-agnostic; promts asking for single-word responses get the same behaviour as prompts asking for multiple paragraphs. This is browser- and system- agnostic; chrome, firefox, andriod app all behave the same.

This appears universal and user-agnostic; multiple users commented on my posts in r/openAI and r/chatgpt saying that they were also having this problem. I currently don't have a single person telling me that O3 is functinal for them.

What we can do:

If you write to openAI and just say "O3 is broken" they will tell you it is a browser or system issue and tell you to clear your cache etc. You will have several rounds of back and forth before they ask you for the evidence of timestamps and HAR files. To avoid all that, feel free to use the draft email below, fill in your details, delete what is not applicable, and send to support@openai.com . I've also included instructions on how to gather the evidence.

HOW TO GATHER EVIDENCE: TIMESTAMPS AND HAR FILES

You will need a couple of failed o3 attempts, plus one or two HAR files from failed attempts.

- Record 2–3 failures

For each test:

Open ChatGPT.

Select o3 as the model. On Chrome, you can do this by clicking the intelligence level, selecting "advanced", and choosing O3 on the dropdown. On Android, you need to go to settings -> General -> Model. Please comment below if you can't find the model and I will help you find it.

Open a brand-new chat.

Send a very simple prompt that should produce a short, unambiguous answer, such as:

What is the capital of Malawi?

What is 2+2?

Watch what o3 does. Some failure modes I've seen include:

The response stops partway through.

The answer appears, but the normal buttons underneath it do not appear.

No answer appears at all.

o3 answers an earlier prompt instead of the current one.

Write down the exact time and timezone when the failure occurred. This is crucial. Do it as soon as the response appears.

If an answer appeared, refresh the ChatGPT page and check whether the o3 answer disappears.