OpenAI

Model timelines and latest releases from OpenAI.

Model timelines

Release history per model from this vendor. Click any marker for the version page.

44oo1-previewo1o3o3-pro55.3 Codex5.3 Codex Spark5.45.5Apr '23Jul '23Oct '23Jan '24Apr '24Jul '24Oct '24Jan '25Apr '25Jul '25Oct '25Jan '26Apr '26calendar time

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

Models