OpenAI just quietly retired the last of the GPT-4 models — and it feels like the end of an AI era

https://www.techradar.com/author/graham-barlow· May 29, 2026 · 3:29 PM UTC ·11 min read · 0 reactions · 0 comments · 30 views

#openai #gpt-4 #artificial-intelligence

OpenAI just quietly retired the last of the GPT-4 models — and it feels like the end of an AI era

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OpenAI has officially retired the last of its GPT-4 models, marking the end of an era for this influential AI technology. The retirement includes GPT-4.5 and o3, which will no longer be available after specified sunset periods. Many users are expressing nostalgia for these models, which played a significant role in the generative AI boom.

Key facts

▪OpenAI is retiring GPT-4.5 and o3 from ChatGPT, signaling the end of the GPT-4 era.
▪The retirement of these models follows a trend of phasing out older versions to focus on newer, more capable models.
▪Users have expressed disappointment and nostalgia for GPT-4 and its offshoots, which were seen as groundbreaking in AI development.

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Original publisher	TechRadar
Canonical URL	https://www.techradar.com/ai-platforms-assistants/chatgpt/openai-just-quietly-retired-the-last-of-the-gpt-4-models-and-it-feels-like-the-end-of-an-ai-era
Publication time	Fri, 29 May 2026 15:29:30 +0000
Retrieval time	2026-05-29T15:35:02.048Z
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AI Platforms & Assistants OpenAI ChatGPT OpenAI just quietly retired the last of the GPT-4 models — and it feels like the end of an AI era News By Graham Barlow published 29 May 2026 The GPT-4 era is coming to an end inside ChatGPT When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Getty Images / VCG) Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Threads Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter OpenAI is retiring GPT-4.5, the final GPT-4 model still available in ChatGPTThe move closes the chapter on the AI model that helped spark the generative AI boomSome people are already nostalgic for GPT-4 and GPT-4o, despite…

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