AsOf

model family · lineage

Latest OpenAI o-series model: o3-pro

As of November 4, 2026, the latest OpenAI o-series model on the AsOf record is o3-pro, released on June 10, 2025 by OpenAI, from a primary source (developers.openai.com). The newest in each other line: OpenAI o4-mini (April 16, 2025) and OpenAI o3 (April 16, 2025). The record holds 8 OpenAI o-series models, 8 with a checked release date.

latest model
o3-proJune 10, 2025 · developers.openai.com · as of 2026-11-04

O Pro

2 models · oldest first
  1. o1-proreleased 2025-03-19 · deprecated 2026-04-22 · retired 2026-10-23

    API ids: o1-pro, o1-pro-2025-03-19

  2. o3-prolatestreleased 2025-06-10 · deprecated 2026-06-11

    API ids: o3-pro, o3-pro-2025-06-10

O Mini

3 models · oldest first
  1. OpenAI o1-minireleased 2024-09-12 · deprecated 2025-04-28 · retired 2025-10-27

    API ids: o1-mini

  2. OpenAI o3-minireleased 2025-01-31 · deprecated 2026-04-22 · retired 2026-10-23

    API ids: o3-mini, o3-mini-2025-01-31

  3. OpenAI o4-minireleased 2025-04-16 · deprecated 2026-04-22 · retired 2026-10-23

    API ids: o4-mini, o4-mini-2025-04-16

O Series

3 models · oldest first
  1. OpenAI o1-previewreleased 2024-09-12 · deprecated 2025-04-28 · retired 2025-07-28

    API ids: o1-preview

  2. OpenAI o1released 2024-12-17 · deprecated 2026-04-22 · retired 2026-10-23

    API ids: o1, o1-2024-12-17

  3. OpenAI o3released 2025-04-16 · deprecated 2026-06-11

    API ids: o3, o3-2025-04-16

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