ChatGPT: Difference between revisions

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===Security breach (2023)===

On March 20, 2023 a bug allowed some users to see other users' conversation titles. Sam Altman, OpenAI's CEO, stated users couldn't view other users' conversation content. After the bug was fixed, users reported they were unable to view their conversation history. Later reports showed this issue was much bigger than it was thought at first, with OpenAI reporting there were leaks of the users' name, last name, e-mail address, payment address, and partial credit card information.<ref>{{Cite web |last=Simo |first=Fidgi |date=20 March 2023 |title=March 20 ChatGPT outage: Here’s what happened |url=https://openai.com/index/march-20-chatgpt-outage/ |url-status=live |archive-url=https://archive.is/HFapg |archive-date=2025-08-24 |access-date=26 Jan 2026 |website=OpenAI}}</ref>

===ChatGPT-4o (2024-2026)===

On may 13, 2024, OpenAI announced and released the model ChatGPT-4o.<ref>{{Cite web |author=OpenAI |date=10 Oct 2025 |title=Hello, GPT-4o |url=https://openai.com/es-ES/index/hello-gpt-4o/ |url-status=live |archive-url=https://archive.is/Yrdyg |archive-date=2024-02-15 |access-date=26 Jan 2026 |website=OpenAI}}</ref> The model was temporarily retired from the public in April 2025 due to an update that caused the model to have excessive sychophancy. <ref>{{Cite web |last=Franzen |first=Carl |date=30 Apr 2025 |title=OpenAI rolls back ChatGPT's sycophancy and explains what went wrong |url=https://venturebeat.com/ai/openai-rolls-back-chatgpts-sycophancy-and-explains-what-went-wrong |url-status=live |archive-url=https://archive.is/dvr23 |archive-date=2026-02-15 |access-date=15 Feb 2026 |website=VentureBeat}}</ref>It also had several controversies because of users developing [[wikipedia:Chatbot_psychosis|AI psychosis]], with some severe cases ending with users commiting suicide. <ref>{{Cite web |last=Hill |first=Kashmir |date=13 Jun 2025 |title=They Asked an A.I. Chatbot Questions. The Answers Sent Them Spiraling. |url-status=live |archive-url=https://archive.ph/20250628210745/https://www.nytimes.com/2025/06/13/technology/chatgpt-ai-chatbots-conspiracies.html |archive-date=2025-10-13 |access-date=15 Feb 2025 |website=The New York Times}}</ref>

With the launch of GPT-5 in August 2025, OpenAI removed legacy models from non-API users, such as GPT-4o. This decision caused an outrage, with users complaining about the removal of the models along with the complaints about GPT-5. OpenAI's response was to end paywalling these older models, making them available only for Plus users.

In 2026, OpenAI announced they will be removing definitely GPT-4o and other models, such as GPT-5 and GPT-4.1. On February 13, 2026, 4o and other legacy models were removed for non-API users, causing again controversies in social media. These legacy models will be removed for API-users on April 2026. {{Citation needed}}

===Users' data retention by court mandate (May 2025 - October 2025)===

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<ref>{{Cite web |last=Edwards |first=Benj |date=11 Aug 2025 |title=The GPT-5 rollout has been a big mess |url=https://arstechnica.com/information-technology/2025/08/the-gpt-5-rollout-has-been-a-big-mess/ |url-status=live |archive-url=https://archive.is/RL6ea |archive-date=2025-08-12 |access-date=5 Feb 2026 |website=Ars Technica}}</ref> <ref>{{Cite web |last=Franzen |first=Carl |date=8 Aug 2025 |title=OpenAI returns old models to ChatGPT as Sam Altman admits ‘bumpy’ GPT-5 rollout |url=https://venturebeat.com/business/openai-returns-old-models-to-chatgpt-as-sam-altman-admits-bumpy-gpt-5-rollout |url-status=live |archive-url=https://archive.is/hunUK |archive-date=2026-02-05 |access-date=5 Feb 2026 |website=VentureBeat}}</ref>

~~===Removal of ChatGPT-4o and other legacy models (August 2025; February 2026)===~~

~~{{Main|OpenAI removes ChatGPT 4o and other legacy models}}~~

With the launch of GPT-5 in August 2025, OpenAI removed legacy models from non-API users, such as GPT-4o. This decision caused an outrage, with users complaining about the removal of the models along with the complaints about GPT-5. OpenAI's response was to end paywalling these older models, making them available only for Plus users.

In 2026, OpenAI announced they will be removing definitely GPT-4o and other models, such as GPT-5 and GPT-4.1. On February 13, 2026, 4o and other legacy models were removed for non-API users, causing again controversies in social media. These legacy models will be removed for API-users on April 2026. {{Citation needed}}

===Age verification (2026)===

@@ Line 34: / Line 34: @@
 ===Security breach (2023)===
 On March 20, 2023 a bug allowed some users to see other users' conversation titles. Sam Altman, OpenAI's CEO, stated users couldn't view other users' conversation content. After the bug was fixed, users reported they were unable to view their conversation history. Later reports showed this issue was much bigger than it was thought at first, with OpenAI reporting there were leaks of the users' name, last name, e-mail address, payment address, and partial credit card information.<ref>{{Cite web |last=Simo |first=Fidgi |date=20 March 2023 |title=March 20 ChatGPT outage: Here’s what happened |url=https://openai.com/index/march-20-chatgpt-outage/ |url-status=live |archive-url=https://archive.is/HFapg |archive-date=2025-08-24 |access-date=26 Jan 2026 |website=OpenAI}}</ref>
+===ChatGPT-4o (2024-2026)===
+{{Main|ChatGPT-4o}}
+On may 13, 2024, OpenAI announced and released the model ChatGPT-4o.<ref>{{Cite web |author=OpenAI |date=10 Oct 2025 |title=Hello, GPT-4o |url=https://openai.com/es-ES/index/hello-gpt-4o/ |url-status=live |archive-url=https://archive.is/Yrdyg |archive-date=2024-02-15 |access-date=26 Jan 2026 |website=OpenAI}}</ref> The model was temporarily retired from the public in April 2025 due to an update that caused the model to have excessive sychophancy. <ref>{{Cite web |last=Franzen |first=Carl |date=30 Apr 2025 |title=OpenAI rolls back ChatGPT's sycophancy and explains what went wrong |url=https://venturebeat.com/ai/openai-rolls-back-chatgpts-sycophancy-and-explains-what-went-wrong |url-status=live |archive-url=https://archive.is/dvr23 |archive-date=2026-02-15 |access-date=15 Feb 2026 |website=VentureBeat}}</ref>It also had several controversies because of users developing [[wikipedia:Chatbot_psychosis|AI psychosis]], with some severe cases ending with users commiting suicide. <ref>{{Cite web |last=Hill |first=Kashmir |date=13 Jun 2025 |title=They Asked an A.I. Chatbot Questions. The Answers Sent Them Spiraling. |url-status=live |archive-url=https://archive.ph/20250628210745/https://www.nytimes.com/2025/06/13/technology/chatgpt-ai-chatbots-conspiracies.html |archive-date=2025-10-13 |access-date=15 Feb 2025 |website=The New York Times}}</ref>
+With the launch of GPT-5 in August 2025, OpenAI removed legacy models from non-API users, such as GPT-4o. This decision caused an outrage, with users complaining about the removal of the models along with the complaints about GPT-5. OpenAI's response was to end paywalling these older models, making them available only for Plus users.
+In 2026, OpenAI announced they will be removing definitely GPT-4o and other models, such as GPT-5 and GPT-4.1. On February 13, 2026, 4o and other legacy models were removed for non-API users, causing again controversies in social media. These legacy models will be removed for API-users on April 2026. {{Citation needed}}
 ===Users' data retention by court mandate (May 2025 - October 2025)===
@@ Line 42: / Line 48: @@
 <ref>{{Cite web |last=Edwards |first=Benj |date=11 Aug 2025 |title=The GPT-5 rollout has been a big mess |url=https://arstechnica.com/information-technology/2025/08/the-gpt-5-rollout-has-been-a-big-mess/ |url-status=live |archive-url=https://archive.is/RL6ea |archive-date=2025-08-12 |access-date=5 Feb 2026 |website=Ars Technica}}</ref> <ref>{{Cite web |last=Franzen |first=Carl |date=8 Aug 2025 |title=OpenAI returns old models to ChatGPT as Sam Altman admits ‘bumpy’ GPT-5 rollout |url=https://venturebeat.com/business/openai-returns-old-models-to-chatgpt-as-sam-altman-admits-bumpy-gpt-5-rollout |url-status=live |archive-url=https://archive.is/hunUK |archive-date=2026-02-05 |access-date=5 Feb 2026 |website=VentureBeat}}</ref>
-===Removal of ChatGPT-4o and other legacy models (August 2025; February 2026)===
-{{Main|OpenAI removes ChatGPT 4o and other legacy models}}
-With the launch of GPT-5 in August 2025, OpenAI removed legacy models from non-API users, such as GPT-4o. This decision caused an outrage, with users complaining about the removal of the models along with the complaints about GPT-5. OpenAI's response was to end paywalling these older models, making them available only for Plus users.
-In 2026, OpenAI announced they will be removing definitely GPT-4o and other models, such as GPT-5 and GPT-4.1. On February 13, 2026, 4o and other legacy models were removed for non-API users, causing again controversies in social media. These legacy models will be removed for API-users on April 2026. {{Citation needed}}
 ===Age verification (2026)===