Version history

Every shipped version of this model. Click a marker to open its release page.

4 - Mar 1444 Turbo - Nov 64 Turbo4o - May 134oo1-preview - Sep 12o1-previewo1 - Dec 5o154.5 - Feb 27 4.1 - Apr 14 o3 - Apr 16 o3-pro - Jun 10 5 - Aug 7 Expand to show separately5 releases45.3 Codex - Feb 5 5.3 Codex Spark - Feb 13 5.4 - Mar 6 5.5 - Apr 23 Expand to show separately4 releases2023 Q22023 Q32023 Q42024 Q12024 Q22024 Q32024 Q42025 Q12025 Q22025 Q32025 Q42026 Q12026 Q2
AI Model

GPT

byOpenAI

OpenAI's flagship large language model series.

Latest version:5.5Released

All Versions

GPT 5.5

Released
Released on April 23, 2026

GPT 5.4

Released
Released on March 6, 2026

GPT 5.3 Codex Spark

Released
Released on February 13, 2026

GPT 5.3 Codex

Released
Released on February 5, 2026

GPT 5

Released
Released on August 7, 2025

GPT o3-pro

Released
Released on June 10, 2025

GPT o3

Released
Released on April 16, 2025

GPT 4.1

Released
Released on April 14, 2025

GPT 4.5

Released
Released on February 27, 2025

GPT o1

Released
Released on December 5, 2024

GPT o1-preview

Released
Released on September 12, 2024

GPT 4o

Released
Released on May 13, 2024

GPT 4 Turbo

Released
Released on November 6, 2023

GPT 4

Released
Released on March 14, 2023