OpenAI’s big language model update was finally revealed to the public on Thursday and soon started rolling out to all users. After the GPT-5 launch, OpenAI decided to discontinue its older models running ChatGPT like GPT-4o, GPT-4.1, o3, o3 Pro, o4-mini and more.
For most use cases, GPT-5 takes over the reins from class=”backlink” target=”_blank” href=”https://www.livemint.com/technology/tech-news/after-gpt-5-backlash-sam-altman-confirms-gpt-4o-is-coming-back-to-chatgpt-but-there-s-a-catch-11754700884291.html” data-vars-page-type=”story” data-vars-link-type=”Manual” data-vars-anchor-text=”GPT-4o”>GPT-4o, the large language model which replaced class=”backlink” target=”_blank” href=”https://www.livemint.com/ai/artificial-intelligence/openai-roll-back-goodbye-chatgpt-4-you-kicked-off-a-revolution-say-ceo-sam-altman-user-complaint-reactions-ai-tech-news-11746070049229.html” data-vars-page-type=”story” data-vars-link-type=”Manual” data-vars-anchor-text=”GPT-4″>GPT-4 as the default model on ChatGPT earlier this year.
In case you are wondering what exactly has changed…

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