Name: GPT-5.1 Codex
Author: OpenAI

Question 1

When was GPT-5.1 Codex released?

Accepted Answer

GPT-5.1 Codex was released on November 19, 2025 by OpenAI.

Question 2

Who created GPT-5.1 Codex?

Accepted Answer

GPT-5.1 Codex was created by OpenAI.

Question 3

What is the license for GPT-5.1 Codex?

Accepted Answer

GPT-5.1 Codex is released under the Proprietary license.

Question 4

What is the knowledge cutoff date for GPT-5.1 Codex?

Accepted Answer

GPT-5.1 Codex has a knowledge cutoff of September 2024. This means the model was trained on data up to this date and may not have information about events after this time.

Question 5

Is GPT-5.1 Codex multimodal?

Accepted Answer

Yes, GPT-5.1 Codex is a multimodal model that can process both text and images as input.