# Suddenly don't have access to GPT-4.5 API: Error code: 404 - {'error': {'message': 'The model \`gpt-4.5-preview\` does not exist or you do not have access to it.', **URL:** \ **Category:** Bugs\ **Created:** [August 6, 2025, 8:12am UTC](https://community.openai.com/t/suddenly-dont-have-access-to-gpt-4-5-api-error-code-404-error-message-the-model-gpt-4-5-preview-does-not-exist-or-you-do-not-have-access-to-it/1335285 "2025-08-06T08:12:28Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Karen\_McNeil](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/karen_mcneil/32/652241_2.png) [@Karen\_McNeil](https://community.openai.com/u/Karen_McNeil)\ **Post date:** [August 6, 2025, 8:12am UTC](https://community.openai.com/t/suddenly-dont-have-access-to-gpt-4-5-api-error-code-404-error-message-the-model-gpt-4-5-preview-does-not-exist-or-you-do-not-have-access-to-it/1335285/1 "2025-08-06T08:12:28Z")
I’ve been developing an application using either 4o or 4.5-preview (for different tasks). I couple of weeks ago I was using 4.5 quite heavily (spent over a hundred dollars in API costs), but now the exact same code is triggering this error: `Error code: 404 - {'error': {'message': 'The model `gpt-4.5-preview` does not exist or you do not have access to it.', 'type': 'invalid_request_error', 'param': None, 'code': 'model_not_found'}}` If I use 4o the code works fine. My organization is Tier 3, so it shouldn’t be an access problem. I also have a positive credit balance and am nowhere near my monthly limit. I tried creating a new API key (which I saw recommended on other posts with similar issues) but that didn’t work. Any ideas? ---
**Author:** ![sps](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/sps/32/7736_2.png) [@sps](https://community.openai.com/u/sps)\ **Post date:** [August 6, 2025, 1:25pm UTC](https://community.openai.com/t/suddenly-dont-have-access-to-gpt-4-5-api-error-code-404-error-message-the-model-gpt-4-5-preview-does-not-exist-or-you-do-not-have-access-to-it/1335285/3 "2025-08-06T13:25:02Z")
Welcome to the developer forum @Karen_McNeil On the API, `gpt-4.5` was in research preview and was set to be phased out by July 14. ---
**Author:** ![Karen\_McNeil](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/karen_mcneil/32/652241_2.png) [@Karen\_McNeil](https://community.openai.com/u/Karen_McNeil)\ **Post date:** [August 6, 2025, 1:55pm UTC](https://community.openai.com/t/suddenly-dont-have-access-to-gpt-4-5-api-error-code-404-error-message-the-model-gpt-4-5-preview-does-not-exist-or-you-do-not-have-access-to-it/1335285/4 "2025-08-06T13:55:02Z")
Ah, I see! It’s still listed on their Prices page so I didn’t realise that it have been phased out. Do you know if it’s going to be offered as a production model? I think, for me, I’ve solved my problem. I had been using 4.5 as a fallback when 4o gave several refusals in a row (“I’m sorry, I can’t help you…”) I’m not sure why I was getting refusals so often, but I improved the refusal rate by adding some encouragement ("Remember, you **can** do this!) to the prompt. And I added 4.1 as the fallback (I still sometimes get several refusals in a row). It seems to actually work really well and I might replace 4o with 4.1 as the primary model anyway, it doesn’t seem to have the same refusal problem that 4o does. ---
**Author:** ![merefield](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/merefield/32/14812_2.png) [@merefield](https://community.openai.com/u/merefield)\ **Post date:** [August 6, 2025, 2:04pm UTC](https://community.openai.com/t/suddenly-dont-have-access-to-gpt-4-5-api-error-code-404-error-message-the-model-gpt-4-5-preview-does-not-exist-or-you-do-not-have-access-to-it/1335285/5 "2025-08-06T14:04:33Z")
Yep > [@GPT-4.5-preview model will be removed from the API on 2025-07-14](https://community.openai.com/t/gpt-4-5-preview-model-will-be-removed-from-the-api-on-2025-07-14/1230050/3): > > In my benchmarks 4.1 is better than 4o which is great for most applications, but far from 4.5-preview. I guess size matters A big shame because it is an excellent model, if rather pricey! ---
**Author:** ![\_j](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/_j/32/766292_2.png) [@\_j](https://community.openai.com/u/_j)\ **Post date:** [August 6, 2025, 2:58pm UTC](https://community.openai.com/t/suddenly-dont-have-access-to-gpt-4-5-api-error-code-404-error-message-the-model-gpt-4-5-preview-does-not-exist-or-you-do-not-have-access-to-it/1335285/7 "2025-08-06T14:58:00Z")
The answer: OpenAI announced they would shut off the model GPT-4.5 on API in the same breath as introducing GPT-4.1 in April. OpenAI sent multiple emails to anyone who had made calls to GPT-4.5 in the 30-day lead up to the shutoff date. It has been turned off for over two weeks.