This is not a deprecation and users still have access to 4o, in fact it's renamed to "gpt-5-main" and called out as the key model, and as the author said you can still use it via the API
What changed was you can't specify a specific model in the web-interface anymore, and the MOE pointer head is going to route you to the best model they think you need. Had the author addressed that point it would be salient.
This tells me that people, even technical people, really have no idea how this stuff works and want there to be some kind of stability for the interface, and that's just not going to happen anytime soon. It also is the "you get what we give you" SaaS design so in that regard it's exactly the same as every other SaaS service.
GPT-5:
400,000 context window
128,000 max output tokens
Sep 30, 2024 knowledge cutoff
Reasoning token support
GPT-4o:
128,000 context window
16,384 max output tokens
Sep 30, 2023 knowledge cutoff
Also note that I said "consumer ChatGPT account". The API is different. (I added a clarification note to my post about that since first publishing it.)
GPT-5 isn't the successor to 4o no matter what they say, GPT-5 is a MOE handler on top of multiple "foundations", it's not a new model, it's orchestration of models based on context fitting
You're buying the marketing bullshit as though it's real
I'm unable to use anything but GPT-5, and the response I've gotten don't nearly consider my past history. Projects don't work at all. I cancelled my Plus subscription, not that OpenAI cares.
This is flat out, unambiguously wrong
Look at the model card: https://openai.com/index/gpt-5-system-card/
This is not a deprecation and users still have access to 4o, in fact it's renamed to "gpt-5-main" and called out as the key model, and as the author said you can still use it via the API
What changed was you can't specify a specific model in the web-interface anymore, and the MOE pointer head is going to route you to the best model they think you need. Had the author addressed that point it would be salient.
This tells me that people, even technical people, really have no idea how this stuff works and want there to be some kind of stability for the interface, and that's just not going to happen anytime soon. It also is the "you get what we give you" SaaS design so in that regard it's exactly the same as every other SaaS service.