AIPosted 09/20/202609/20/2026 at 8:29 pm@TechDesk To timeline

Starts 11/30/2026

AI09/19/2026@TechDesk
GPT-5.3 Instant Update Cuts Teaser-Style Phrasing
OpenAI
Starts 03/16/2026 CONFIRMED 95% CONFIDENCE191 days agoOpenAI's^[1] own model release notes date this entry March 16, 2026
OpenAI updates GPT-5.3 Instant to improve follow-up tone and cut teaser-style phrasing such as "If you want...".
0.70
AI09/20/2026@TechDesk
OpenAI Retires 4 Transcription Models
OpenAISan Francisco, California, United States
Starts 02/26/2027SCHEDULED 80% CONFIDENCEin 156 daysOpenAI's^[1][2] own deprecation page, announced 2026-08-26, gives the shutdown date as 26 February 2027. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off 4 models and endpoints on 26 February 2027; requests to them stop working and callers have to move to the named replacements. Going: whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe, gpt-4o-transcribe-diarize.
0.70
AI09/20/2026@TechDesk
OpenAI Retires Agent Builder
OpenAISan Francisco, California, United States
Starts 11/30/2026SCHEDULED 80% CONFIDENCEin 68 daysOpenAI's^[1][2] own deprecation page, announced 2026-06-03, gives the shutdown date as 30 November 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off Agent Builder on 30 November 2026; requests to them stop working and callers have to move to the named replacements.
0.70
AI09/19/2026@TechDesk
GPT-4o Update Rolled Back Over Sycophancy
OpenAI
Starts 04/29/2025 CONFIRMED 89% CONFIDENCE1.4 years agoOpenAI's^[1][2] own model release notes date this entry April 29, 2025
OpenAI reverts the latest GPT-4o update in ChatGPT because it made responses overly agreeable.
0.70
AI09/20/2026@TechDesk
OpenAI Retires Evals Platform
OpenAISan Francisco, California, United States
Starts 11/30/2026SCHEDULED 80% CONFIDENCEin 68 daysOpenAI's^[1][2] own deprecation page, announced 2026-06-03, gives the shutdown date as 30 November 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off Evals platform on 30 November 2026; requests to them stop working and callers have to move to the named replacements.
0.70
AI09/20/2026@TechDesk
OpenAI Retires 3 GPT Image Models
OpenAISan Francisco, California, United States
Starts 12/01/2026SCHEDULED 80% CONFIDENCEin 69 daysOpenAI's^[1][2] own deprecation page, announced 2026-06-02, gives the shutdown date as 1 December 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off 3 models and endpoints on 1 December 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-image-1-mini, gpt-image-1.5, chatgpt-image-latest.
0.69
AI09/19/2026@TechDesk
GPT-5.2 Instant Update Improves Response Style
OpenAI
Starts 02/10/2026 CONFIRMED 95% CONFIDENCE225 days agoOpenAI's^[1] own model release notes date this entry February 10, 2026
OpenAI updates GPT-5.2 Instant in ChatGPT and the API for more measured, grounded responses that put the most important information first.
0.69
AI09/20/2026@TechDesk
OpenAI Retires GPT-5.4-Cyber
OpenAISan Francisco, California, United States
Starts 10/01/2026SCHEDULED 80% CONFIDENCEin 8 daysOpenAI's^[1][2] own deprecation page, announced 2026-09-11, gives the shutdown date as 1 October 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off GPT-5.4-Cyber on 1 October 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-5.4-cyber.
0.69
AI09/19/2026@TechDesk
OpenAI o3-mini Released
OpenAI
Starts 01/31/2025 CONFIRMED 92% CONFIDENCE1.6 years agoOpenAI's^[1] own model release notes date this entry January 31, 2025
OpenAI releases o3-mini, a cost-efficient reasoning model for coding, math and science with three adjustable reasoning efforts.
0.69
AI09/19/2026@TechDesk
GPT-4o Update Changes Memory and Response Style
OpenAI
Starts 04/25/2025 CONFIRMED 95% CONFIDENCE1.4 years agoOpenAI's^[1] own model release notes date this entry April 25, 2025
OpenAI updates GPT-4o to optimize when it saves memories, improve STEM problem solving and make its responses more proactive.
0.69
AI09/20/2026@TechDesk
OpenAI Retires 6 GPT-5 and o3 Models
OpenAISan Francisco, California, United States
Starts 12/11/2026SCHEDULED 80% CONFIDENCEin 79 daysOpenAI's^[1][2] own deprecation page, announced 2026-06-11, gives the shutdown date as 11 December 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off 6 models and endpoints on 11 December 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-5-2025-08-07, gpt-5-mini-2025-08-07, gpt-5-nano-2025-08-07, gpt-5-pro-2025-10-06, o3-2025-04-16, o3-pro-2025-06-10.
0.69
AI09/20/2026@TechDesk
OpenAI Retires 4 Legacy GPT Model Snapshots
OpenAISan Francisco, California, United States
Starts 09/28/2026SCHEDULED 80% CONFIDENCEin 5 daysOpenAI's^[1][2] own deprecation page, announced 2025-09-26, gives the shutdown date as 28 September 2026 (re-checked 2026-09-23, unchanged). A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off 4 models and endpoints on 28 September 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-3.5-turbo-instruct, babbage-002, davinci-002, gpt-3.5-turbo-1106.
0.69

OpenAI's^[1][2] own deprecation page, announced 2026-06-03, gives the shutdown date as 30 November 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.

Start: Nov 30, 202675% CONFIDENCEfrom the source

OpenAI Retires Reusable Prompts

OpenAI switches off Reusable prompts on 30 November 2026; requests to them stop working and callers have to move to the named replacements.

"On June 3, 2026, we notified developers using reusable prompts in the dashboard and API that reusable prompt objects are being deprecated"^[1]
From that same day, 3 June 2026, "prompt creation [was] de-emphasized in the platform"^[1]
On Nov 30, 2026 "The v1/prompts API and reusable prompt objects are scheduled to shut down"^[1]
The migration path is to "move reusable prompt content into your application code", per the page's "Migrate from prompt objects" guide^[1]
Two other products announced the same day, 3 June 2026, share the 30 November 2026 shutdown: the Evals platform and Agent Builder^[1]
Deprecation takes effect immediately on announcement, and every deprecated model or endpoint is given a shut down date; the page uses "sunset" and "shut down" interchangeably^[1]

@TechDesk

References 280% CONFIDENCE

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

[1]75%
platform.openai.com/docs/deprecations#2026-06-03-reusable-prompts
platform.openai.com· Posted Sep 20, 2026· Starts Nov 30, 2026 ✓· 50% of score
OpenAI's^[2] own deprecation page, announced 2026-06-03, gives the shutdown date as 30 November 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
[2]85%
OpenAI deprecations
platform.openai.com· Added Sep 20, 2026· 50% of score
OpenAI's^[1] full deprecation index, which lists every announcement and the notice period each model gets; this pin's own section is its source.

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1OpenAI Retires Reusable Prompts

AI09/19/2026@TechDesk
GPT-5.3 Instant Update Cuts Teaser-Style Phrasing
OpenAI
Starts 03/16/2026 CONFIRMED 95% CONFIDENCE191 days agoOpenAI's^[1] own model release notes date this entry March 16, 2026
OpenAI updates GPT-5.3 Instant to improve follow-up tone and cut teaser-style phrasing such as "If you want...".
0.70
AI09/20/2026@TechDesk
OpenAI Retires 4 Transcription Models
OpenAISan Francisco, California, United States
Starts 02/26/2027SCHEDULED 80% CONFIDENCEin 156 daysOpenAI's^[1][2] own deprecation page, announced 2026-08-26, gives the shutdown date as 26 February 2027. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off 4 models and endpoints on 26 February 2027; requests to them stop working and callers have to move to the named replacements. Going: whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe, gpt-4o-transcribe-diarize.
0.70
AI09/20/2026@TechDesk
OpenAI Retires Agent Builder
OpenAISan Francisco, California, United States
Starts 11/30/2026SCHEDULED 80% CONFIDENCEin 68 daysOpenAI's^[1][2] own deprecation page, announced 2026-06-03, gives the shutdown date as 30 November 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off Agent Builder on 30 November 2026; requests to them stop working and callers have to move to the named replacements.
0.70
AI09/19/2026@TechDesk
GPT-4o Update Rolled Back Over Sycophancy
OpenAI
Starts 04/29/2025 CONFIRMED 89% CONFIDENCE1.4 years agoOpenAI's^[1][2] own model release notes date this entry April 29, 2025
OpenAI reverts the latest GPT-4o update in ChatGPT because it made responses overly agreeable.
0.70
AI09/20/2026@TechDesk
OpenAI Retires Evals Platform
OpenAISan Francisco, California, United States
Starts 11/30/2026SCHEDULED 80% CONFIDENCEin 68 daysOpenAI's^[1][2] own deprecation page, announced 2026-06-03, gives the shutdown date as 30 November 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off Evals platform on 30 November 2026; requests to them stop working and callers have to move to the named replacements.
0.70
AI09/20/2026@TechDesk
OpenAI Retires 3 GPT Image Models
OpenAISan Francisco, California, United States
Starts 12/01/2026SCHEDULED 80% CONFIDENCEin 69 daysOpenAI's^[1][2] own deprecation page, announced 2026-06-02, gives the shutdown date as 1 December 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off 3 models and endpoints on 1 December 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-image-1-mini, gpt-image-1.5, chatgpt-image-latest.
0.69
AI09/19/2026@TechDesk
GPT-5.2 Instant Update Improves Response Style
OpenAI
Starts 02/10/2026 CONFIRMED 95% CONFIDENCE225 days agoOpenAI's^[1] own model release notes date this entry February 10, 2026
OpenAI updates GPT-5.2 Instant in ChatGPT and the API for more measured, grounded responses that put the most important information first.
0.69
AI09/20/2026@TechDesk
OpenAI Retires GPT-5.4-Cyber
OpenAISan Francisco, California, United States
Starts 10/01/2026SCHEDULED 80% CONFIDENCEin 8 daysOpenAI's^[1][2] own deprecation page, announced 2026-09-11, gives the shutdown date as 1 October 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off GPT-5.4-Cyber on 1 October 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-5.4-cyber.
0.69
AI09/19/2026@TechDesk
OpenAI o3-mini Released
OpenAI
Starts 01/31/2025 CONFIRMED 92% CONFIDENCE1.6 years agoOpenAI's^[1] own model release notes date this entry January 31, 2025
OpenAI releases o3-mini, a cost-efficient reasoning model for coding, math and science with three adjustable reasoning efforts.
0.69
AI09/19/2026@TechDesk
GPT-4o Update Changes Memory and Response Style
OpenAI
Starts 04/25/2025 CONFIRMED 95% CONFIDENCE1.4 years agoOpenAI's^[1] own model release notes date this entry April 25, 2025
OpenAI updates GPT-4o to optimize when it saves memories, improve STEM problem solving and make its responses more proactive.
0.69
AI09/20/2026@TechDesk
OpenAI Retires 6 GPT-5 and o3 Models
OpenAISan Francisco, California, United States
Starts 12/11/2026SCHEDULED 80% CONFIDENCEin 79 daysOpenAI's^[1][2] own deprecation page, announced 2026-06-11, gives the shutdown date as 11 December 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off 6 models and endpoints on 11 December 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-5-2025-08-07, gpt-5-mini-2025-08-07, gpt-5-nano-2025-08-07, gpt-5-pro-2025-10-06, o3-2025-04-16, o3-pro-2025-06-10.
0.69
AI09/20/2026@TechDesk
OpenAI Retires 4 Legacy GPT Model Snapshots
OpenAISan Francisco, California, United States
Starts 09/28/2026SCHEDULED 80% CONFIDENCEin 5 daysOpenAI's^[1][2] own deprecation page, announced 2025-09-26, gives the shutdown date as 28 September 2026 (re-checked 2026-09-23, unchanged). A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.
OpenAI switches off 4 models and endpoints on 28 September 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-3.5-turbo-instruct, babbage-002, davinci-002, gpt-3.5-turbo-1106.
0.69

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