Chronopin: Date tracker for historical and future events

AI09/23/2026@TechDesk

Microsoft and OpenAI Amend Their Partnership, Ending Exclusivity

Microsoft…Microsoft Redmond East Campus, Overlake, Redmond, King County, Washington, United States

Starts 04/27/2026CONFIRMED 90% CONFIDENCEThe Official Microsoft^[1] Blog post dated Apr 27, 2026 says "Today, we are announcing an amended agreement to simplify our partnership"; OpenAI's^[2] copy carries the same date. The pin is the announcement; the terms themselves run through 2030 (revenue share) and 2032 (IP license).

Microsoft's license to OpenAI's models and products becomes non-exclusive through 2032 and OpenAI may sell on any cloud, while OpenAI's revenue-share payments to Microsoft continue through 2030 under a total cap and Microsoft stops paying one back.

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AI09/23/2026@TechDesk

NVIDIA Secures the PORTS-Pike AI Campus in Ohio With SB Energy and OpenAI

NVIDIA…Portsmouth Gaseous Diffusion Plant, Scioto Township, Pike County, Ohio, United States

Starts 08/17/2026CONFIRMED 87% CONFIDENCEThe release is dated August 17, 2026 ("NVIDIA^[1] announced that it has secured land, power and shell (LPS) capacity through a partnership with SB Energy^[5]"), and NVIDIA's 8-K says it announced the partnership and entered the residual value guaranties on August 17, 2026; the release gives no time, so the pin is all-day.

NVIDIA guarantees leases on about 4.25 GW of AI factory capacity at SB Energy's PORTS-Pike campus on the old Portsmouth uranium-enrichment plant in Pike County, Ohio, with OpenAI as tenant and NVIDIA's exposure capped at $105 billion.

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AI09/20/2026@TechDesk

OpenAI Retires 6 Sora 2 Video Generation Models and Videos API

OpenAISan Francisco, California, United States

Starts 09/24/2026SCHEDULED 80% CONFIDENCEOpenAI's^[1][2] own deprecation page, announced 2026-03-24, gives the shutdown date as 24 September 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 24 September 2026; requests to them stop working and callers have to move to the named replacements. Going: Videos API, sora-2, sora-2-pro, sora-2-2025-10-06, sora-2-2025-12-08, sora-2-pro-2025-10-06.

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AI09/20/2026@TechDesk

OpenAI Retires 4 Legacy GPT Model Snapshots

OpenAISan Francisco, California, United States

Starts 09/28/2026SCHEDULED 80% CONFIDENCEOpenAI'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.

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AI09/20/2026@TechDesk

OpenAI Retires GPT-5.4-Cyber

OpenAISan Francisco, California, United States

Starts 10/01/2026SCHEDULED 80% CONFIDENCEOpenAI'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.

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AI09/20/2026@TechDesk

OpenAI Retires 17 Legacy GPT Model Snapshots

OpenAISan Francisco, California, United States

Starts 10/23/2026SCHEDULED 80% CONFIDENCEOpenAI's^[1][2] own deprecation page, announced 2026-04-22, gives the shutdown date as 23 October 2026. A shutdown date is the vendor's commitment to developers and is occasionally pushed back, never brought forward.

OpenAI switches off 17 models and endpoints on 23 October 2026; requests to them stop working and callers have to move to the named replacements. Going: gpt-3.5-turbo-0125, gpt-4-0613, gpt-4-1106-preview, gpt-4-turbo, gpt-4.1-nano, gpt-4o-2024-05-13, gpt-image-1, o1-2024-12-17, o1-pro-2025-03-19, o3-mini-2025-01-31, ft-o4-mini-2025-04-16, o4-mini-2025-04-16 and 5 more.

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AI09/20/2026@TechDesk

OpenAI Retires Reusable Prompts

OpenAISan Francisco, California, United States

Starts 11/30/2026SCHEDULED 80% CONFIDENCEOpenAI'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 Reusable prompts on 30 November 2026; requests to them stop working and callers have to move to the named replacements.

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AI09/20/2026@TechDesk

OpenAI Retires Agent Builder

OpenAISan Francisco, California, United States

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

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AI09/20/2026@TechDesk

OpenAI, 1455 3rd St, San Francisco, CA

OpenAI

Starts 02/28/2027ESTIMATED 67% CONFIDENCEA "by when" market with no scheduled event behind it. February 2027 carries the largest month-on-month jump among the rungs below that block — 12% before February 1 rising to 39% before March 1, 27 points — and a month-only date takes its last day. The April strike (70%) is quoted above both May (49%) and June (61%), so the top of the ladder is out of order and was not used. All figures are the chance the strike list shows, not the Yes price in cents.^[1]

Kalshi

On 20 September 2026 Kalshi put an official OpenAI IPO announcement at 5% before January 2027, 12% before February and 39% before March — a 27-point jump across February. The upper rungs did not run in order: the page showed 70% before April, then 49% before May and 61% before June.

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