OpenAI model releases

Release dates for every GPT model OpenAI has shipped, newest first. The latest is GPT-6.1 Sol, released 29 Sep 2026, and 34 of the 50 run on Opper today. Over the last 12 months OpenAI released 21 models, with a new release typically every 28 days.

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All models
September 20264 releases
  1. 29 Sep
    GPT-6.1 Sol52
  2. 22 Sep
    GPT-6 Luna38
    GPT-6 Sol48
  3. 3 Sep
    GPT-6 Astra53
July 20263 releases
  1. 9 Jul
    GPT-5.6 Luna37
    GPT-5.6 Sol47
    GPT-5.6 Terra42
June 20261 release
  1. 25 Jun
    GPT-5.5 Instant (June 2026)26
May 20261 release
  1. 5 May
    GPT-5.5 Instant (May 2026)23
April 20262 releases
  1. 23 Apr
    GPT-5.538
    GPT-5.5 pro—
March 20264 releases
  1. 17 Mar
    GPT-5.4 Mini24
    GPT-5.4 Nano21
  2. 5 Mar
    GPT-5.439
    GPT-5.4 pro—
February 20261 release
  1. 5 Feb
    GPT-5.3 Codex33
December 20252 releases
  1. 11 Dec
    GPT-5.230
    GPT-5.2 Codex29
November 20253 releases
  1. 13 Nov
    GPT-5.125
    GPT-5.1 Codex24
    GPT-5.1 Codex Mini20
September 20251 release
  1. 23 Sep
    GPT-5 Codex25
August 20256 releases
  1. 7 Aug
    GPT-523
    GPT-5 (ChatGPT)10
    GPT-5 Mini17
    GPT-5 Nano13
  2. 5 Aug
    GPT OSS 120B12
    GPT OSS 20B9
June 20251 release
  1. 10 Jun
    O3 Pro22
April 20255 releases
  1. 16 Apr
    O320
    O4 Mini17
  2. 14 Apr
    GPT-4.113
    GPT-4.1 Mini10
    GPT-4.1 Nano8
March 20252 releases
  1. 27 Mar
    GPT-4o (March 2025, chatgpt-4o-latest)9
  2. 19 Mar
    O1 Pro12
February 20252 releases
  1. 27 Feb
    GPT-4.5 (Preview)10
  2. 15 Feb
    GPT-4o (ChatGPT)7
January 20251 release
  1. 31 Jan
    O3 Mini13
December 20243 releases
  1. 17 Dec
    GPT-4o mini Realtime (Dec '24)—
    GPT-4o Realtime (Dec '24)—
  2. 5 Dec
    O115
November 20241 release
  1. 20 Nov
    GPT-4o8
September 20242 releases
  1. 12 Sep
    o1-mini10
    o1-preview11
July 20241 release
  1. 18 Jul
    GPT-4o Mini7
November 20231 release
  1. 6 Nov
    GPT-4 Turbo7
June 20231 release
  1. 13 Jun
    GPT-3.5 Turbo (0613)—
March 20231 release
  1. 14 Mar
    GPT-47
November 20221 release
  1. 30 Nov
    GPT-3.5 Turbo6

Release dates and intelligence scores from Artificial Analysis, cross-checked against vendor announcements. Follow new releases via RSS.

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