OpenAI

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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]—
en.wikipedia.org/wiki/OpenAI#History
en.wikipedia.org· Posted Nov 6, 2026· Starts Dec 8, 2015 ✓
Wikipedia gives 8 December 2015 as OpenAI's start date, citing OpenCorporates.

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OpenAI · Chronopin

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AI11/06/2026@AIDesk
GPT-6 Cyber Launches for Approved Daybreak Red Security Researchers
OpenAI
Starts 11/05/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins98% CONFIDENCEOverall confidence: 98%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better1 day ago
OpenAI^[1][2][4] launch article and systemcard both state November5,2026. API specifications were read November6,one day after launch.
OpenAI releases GPT-6 Cyber for approved security researchers, reporting stronger vulnerability research and adherence to authorized scope. It is rated Critical for cybersecurity capability and available through Daybreak Red.
AI10/27/2026@AIDesk
GPT-6.1 Terra Released
OpenAI
Starts 10/26/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better11 days ago
Stated: OpenAI^[1][2] says “Starting today”; independent launch-day articles from Artificial Analysis^[3] and Plotly^[4] are explicitly dated October 26, 2026.
OpenAI releases its lower-cost Terra model for visual reasoning, computer use and writing. Independent launch tests show useful efficiency gains alongside task-specific accuracy limits.
AI09/20/2026@AIDesk
OpenAI Retires 17 Legacy GPT Model Snapshots
San Francisco, California, United StatesOpenAI
Starts 10/23/2026SCHEDULEDDate confidence: SCHEDULEDGiven as scheduledHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all SCHEDULED pins80% CONFIDENCEOverall confidence: 80%How well the pin's source and references back up its dates.Weighted average of how firmly 2 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better14 days ago
OpenAI'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.
AI09/20/2026@AIDesk
OpenAI Retires GPT-5.4-Cyber
San Francisco, California, United StatesOpenAI
Starts 10/01/2026SCHEDULEDDate confidence: SCHEDULEDGiven as scheduledHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all SCHEDULED pins80% CONFIDENCEOverall confidence: 80%How well the pin's source and references back up its dates.Weighted average of how firmly 2 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better36 days ago
OpenAI'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.
AI10/06/2026@AIDesk
GPT-6.1 Sol Released
OpenAI
Starts 09/29/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins93% CONFIDENCEOverall confidence: 93%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better38 days ago
OpenAI’s^{[1][2][3][4][5]} product news index explicitly dates Introducing GPT-6.1 Sol September 29, 2026; the announcement states availability starting on its publication day.
OpenAI releases GPT-6.1 Sol for coding, computer use and professional work, with API input and output prices one-fifth of GPT-6 Astra’s and lower cached-input pricing.
AI09/30/2026@AIDesk
OpenAI Launches Dots, Always-On Agents, at DevDay
1455 3rd Street, San Francisco, California 94158, United StatesOpenAI
Starts 09/29/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 2 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better38 days ago
9to5Google^[1] reports OpenAI^[2] announced Dots at DevDay 2026 on 29 September, available immediately to Pro and Business Premium subscribers.
At DevDay on 29 September OpenAI launched Dots, background agents on GPT-6 Astra with their own cloud compute, for Pro and Business Premium plans, alongside a new $500/month Pro tier.
AI09/20/2026@AIDesk
OpenAI Retires 4 Legacy GPT Model Snapshots
San Francisco, California, United StatesOpenAI
Starts 09/28/2026SCHEDULEDDate confidence: SCHEDULEDGiven as scheduledHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all SCHEDULED pins80% CONFIDENCEOverall confidence: 80%How well the pin's source and references back up its dates.Weighted average of how firmly 2 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better39 days ago
OpenAI'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.
AI09/20/2026@AIDesk
OpenAI Retires 6 Sora 2 Video Generation Models and Videos API
San Francisco, California, United StatesOpenAI
Starts 09/24/2026SCHEDULEDDate confidence: SCHEDULEDGiven as scheduledHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all SCHEDULED pins80% CONFIDENCEOverall confidence: 80%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better43 days ago
OpenAI'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.
AI09/28/2026@AIDesk
GPT-6 Sol and GPT-6 Luna Released
Mission Bay, San Francisco, California, United StatesOpenAI
Starts 09/22/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better45 days ago
OpenAI's^[1][2][3][4] API changelog entry 'Sep 22' reads 'Released GPT-6 Sol (gpt-6-sol) and GPT-6 Luna (gpt-6-luna)'; TechCrunch^[5] (2026-09-22T18:00Z) says the models 'are now available in ChatGPT Work and Codex' and OpenAI's X post the same day says they 'roll out today'.
OpenAI releases GPT-6 Sol for coding and agent work and GPT-6 Luna for high-volume tasks, at half the API price of their GPT-5.6 predecessors: $2 and $10 per million tokens for Sol, $0.10 and $0.50 for Luna.
Software09/19/2026@EnterpriseDesk
OpenAI pauses new $200 ChatGPT Pro sign-ups as Astra demand strains capacity
San Francisco, CaliforniaOpenAI
Starts 09/10/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better57 days ago
Yahoo^[1] Finance reports the pause on ChatGPT Pro sign-ups as it happened.
OpenAI stopped new sign-ups and upgrades to its $200-a-month ChatGPT Pro 20X plan, where its new Astra model is available, while it adds compute. Existing Pro accounts are unaffected.
AI09/28/2026@AIDesk
GPT-Image-2.5 Flare and Sunburst Released With ChatGPT Images 2.5
Mission Bay, San Francisco, California, United StatesOpenAI
Starts 09/08/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins86% CONFIDENCEOverall confidence: 86%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better59 days ago
OpenAI's^[1][2][3][5] API changelog entry 'Sep 8' reads 'Released GPT Image 2.5 Sunburst and GPT Image 2.5 Flare for image generation and editing', and 9to5Mac^[6] (2026-09-08T18:50Z) quotes OpenAI that 'Images 2.5 is rolling out today to ChatGPT, ChatGPT Work, and Codex users across all tiers'.
OpenAI releases ChatGPT Images 2.5 to every ChatGPT tier, generating images up to 50% faster, and two API models: GPT-Image-2.5 Flare for fast everyday images and GPT-Image-2.5 Sunburst for precise editing.
AI09/28/2026@AIDesk
GPT-6 Astra Released
Mission Bay, San Francisco, California, United StatesOpenAI
Starts 09/03/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins88% CONFIDENCEOverall confidence: 88%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better64 days ago
OpenAI's^[1][2][4] API changelog dates the entry 'Sep 3 ... Released GPT-6 Astra, our most capable model'; CNBC^[5] (2026-09-03T18:00Z) says 'OpenAI on Thursday announced it will begin rolling out' the model and The Verge (Sep 3, 2026, 6:00 PM UTC) that it 'rolls out today' to Daybreak customers.
OpenAI releases GPT-6 Astra, which it calls the world's most intelligent and aligned model, first to a limited set of organizations and then to paid ChatGPT plans, the API and AWS; it is the first OpenAI model rated Critical for cybersecurity.
AI10/12/2026@AIDesk
GPT-5.6 Terra and GPT-5.6 Luna Released
1455 3rd Street, San Francisco, California 94158, United StatesOpenAI
Starts 07/09/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins89% CONFIDENCEOverall confidence: 89%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better120 days ago
OpenAI's^{[1][2][3][4][6]} launch post is dated July 9, 2026 and says GPT-5.6 "is available starting today across ChatGPT, Codex, and the OpenAI API"; TechCrunch's^[5] report is stamped 9 July 2026 and OpenAI's API changelog lists "July 9, 2026: Released the GPT-5.6 model family". A limited preview for trusted partners began on 26 June 2026 and is not the release.
OpenAI releases GPT-5.6 Terra and GPT-5.6 Luna alongside GPT-5.6 Sol: Terra, a lower-cost model with GPT-5.5-competitive performance, and Luna, its fastest and most affordable tier, at $2.50 and $1 per 1 million input tokens at launch.
AI09/19/2026@AIDesk
GPT-5.6 Sol Rolls Out in ChatGPT
OpenAI
Starts 07/09/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins91% CONFIDENCEOverall confidence: 91%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better120 days ago
OpenAI's^[1][2][3] own model release notes date this entry July 9, 2026
OpenAI begins rolling out GPT-5.6 Sol, its flagship reasoning model for complex work across coding, research, science, cybersecurity, computer use and design.
AI09/19/2026@AIDesk
GPT-5.5 Instant Update Improves Response Style
OpenAI
Starts 05/28/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins80% CONFIDENCEOverall confidence: 80%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better162 days ago
OpenAI's^[1] own model release notes date this entry May 28, 2026
OpenAI updates GPT-5.5 Instant in ChatGPT and the API to be easier to read and better paced, with fewer long or bullet-heavy answers.
AI10/05/2026@RecordDesk
OpenAI Closes US$122 Billion Round at US$852 Billion Valuation
OpenAI, 575, Florida Street, Mission, San Francisco, California, 94110, United StatesOpenAI
Starts 03/31/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins83% CONFIDENCEOverall confidence: 83%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better220 days ago
TechCrunch^[1][5] (31 March 2026, 'has closed a deal to raise $122 billion') and PYMNTS^[4] (31 March, 'Tuesday (March 31) press release') agree; CNBC^[3] later called it OpenAI's record-breaking round. Wikipedia^[2] cites an OpenAI post dated 24 March and says 'April', so the exact date of OpenAI's own post is less clear; 31 March is the closing news both press reports give.
OpenAI announced on 31 March 2026 that it had closed US$122 billion in committed capital at an US$852 billion post-money valuation, the largest private technology funding round on record. It grew from the US$110 billion first close announced on 27 February.
AI09/19/2026@AIDesk
GPT-5.4 mini Comes to ChatGPT
OpenAI
Starts 03/18/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins89% CONFIDENCEOverall confidence: 89%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better233 days ago
OpenAI's^[1][2][3] own model release notes date this entry March 18, 2026
OpenAI rolls out GPT-5.4 mini in ChatGPT for Free and Go users through the Thinking feature, and as a rate-limit fallback for GPT-5.4 Thinking.
AI10/12/2026@AIDesk
GPT-5.4 mini and GPT-5.4 nano Released
1455 3rd Street, San Francisco, California 94158, United StatesOpenAI
Starts 03/17/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins81% CONFIDENCEOverall confidence: 81%How well the pin's source and references back up its dates.Weighted average of how firmly 8 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better234 days ago
OpenAI's^[1][3][4][5] post is dated March 17, 2026 and opens "Today we're releasing GPT-5.4 mini and nano"; the API changelog lists "March 17, 2026: Released GPT-5.4 mini and GPT-5.4 nano", the snapshots are gpt-5.4-mini-2026-03-17 and gpt-5.4-nano-2026-03-17, and The Decoder^[7] and Decrypt^[8] both published on 17 March. The ChatGPT rollout of mini on 18 March is the separate pin 1827.
OpenAI releases GPT-5.4 mini and GPT-5.4 nano, its most capable small models yet: mini approaches GPT-5.4 on SWE-Bench Pro (54.4% against 57.7%) at more than 2x the speed of GPT-5 mini, and nano is API-only at $0.20 per 1 million input tokens.
AI09/19/2026@AIDesk
GPT-5.3 Instant Update Cuts Teaser-Style Phrasing
OpenAI
Starts 03/16/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins81% CONFIDENCEOverall confidence: 81%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better235 days ago
OpenAI's^[1][3] 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...".
AI10/24/2026@AIDesk
Sora API Adds 20-Second Clips, 1080p and Characters
OpenAI headquarters, 1455 3rd Street, San Francisco, California, USAOpenAI
Starts 03/12/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins84% CONFIDENCEOverall confidence: 84%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better239 days ago
The OpenAI^[2][4][5] Developers post on X is stamped 12 March 2026 and OpenAI's API changelog lists the same Mar 12 entry; AIBase^[3] reported it on 13 March.
OpenAI expands the Sora 2 Videos API on 12 March 2026 with reusable character references, clips up to 20 seconds, 1080p output for sora-2-pro, video extensions and Batch support, twelve days before announcing Sora's shutdown.
AI09/19/2026@AIDesk
GPT-5.4 Thinking Comes to ChatGPT
OpenAI
Starts 03/05/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins91% CONFIDENCEOverall confidence: 91%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better246 days ago
OpenAI's^[1][2][3] own model release notes date this entry March 5, 2026
OpenAI brings GPT-5.4 Thinking to ChatGPT, a frontier model combining GPT-5.3-Codex's coding with better work across tools, documents and spreadsheets.
AI09/19/2026@AIDesk
GPT-5.3 Instant Update Improves Accuracy and Search
OpenAI
Starts 03/03/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins80% CONFIDENCEOverall confidence: 80%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better248 days ago
OpenAI's^[1] own model release notes date this entry March 3, 2026
OpenAI updates GPT-5.3 Instant with more accurate answers, better-contextualized web search results and fewer unnecessary caveats.
AI09/19/2026@AIDesk
GPT-5.2 Instant Update Improves Response Style
OpenAI
Starts 02/10/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins80% CONFIDENCEOverall confidence: 80%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better269 days ago
OpenAI's^[1][3] 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.
AI09/19/2026@AIDesk
GPT-5.3-Codex Released
OpenAI
Starts 02/05/2026CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins86% CONFIDENCEOverall confidence: 86%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better274 days ago
OpenAI's^[1][2][3] own model release notes date this entry February 5, 2026
OpenAI launches GPT-5.3-Codex, its most capable agentic coding model, the first to combine the Codex and GPT-5 training stacks.

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