The additions let data teams ask progressive, context‑aware questions in natural language while enabling developers to deploy governed analytics agents across applications via unified API endpoints.

Free ChatGPT users shouldn't notice much of a change, but some devoted 4o users are already clearly disgruntled.

It's been framed as part of a broader model lineup refresh timed with “the previously announced retirement” of GPT-5 (Instant and Thinking) within ChatGPT.

In a post, the AI giant announced that on February 13, GPT-4o and several other AI models will be retired from ChatGPT. These include GPT-5 Instant, GPT-5 Thinking, GPT-4.1, GPT-4.1 mini, and o4-mini.