Version history

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

Hollow markers open release pages. Scroll horizontally for older releases; labels stay fixed on the left.

AI Model

GPT

OpenAI's flagship large language model series.

Latest version:5.5Released

All Versions

GPT 5.5

Released on April 23, 2026

GPT 5.4

Released on March 6, 2026

GPT 5.3 Codex Spark

Released on February 13, 2026

GPT 5.3 Codex

Released on February 5, 2026

GPT 5

Released on August 7, 2025

GPT o3-pro

Released on June 10, 2025

GPT o3

Released on April 16, 2025

GPT o1

Released on December 5, 2024

GPT o1-preview

Released on September 12, 2024

GPT 4o

Released on May 13, 2024

GPT 4

Released on March 14, 2023