OpenAI Blog
May 23, 2025
Addendum to OpenAI o3 and o4-mini system card: OpenAI o3 Operator
We are replacing the existing GPT-4o-based model for Operator with a version based on OpenAI o3. The API version will remain based on 4o.
Retiring GPT-4o, GPT-4.1, GPT-4.1 mini, and OpenAI o4-mini in ChatGPT
On February 13, 2026, alongside the previously announced retirement of GPT‑5 (Instant, Thinking, and Pro), we will retire GPT‑4o, GPT‑4. 1, GPT‑4.
Related stories
OpenAI Blog
Feb 27, 2025
OpenAI GPT-4.5 System Card
We’re releasing a research preview of OpenAI GPT‑4. 5, our largest and most knowledgeable model yet.
OpenAI Blog
May 13, 2024
Spring Update
Introducing GPT-4o and making more capabilities available for free in ChatGPT.
OpenAI Blog
Apr 24, 2024
GPT-4 API general availability and deprecation of older models in the Completions API
GPT-3. 5 Turbo, DALL·E and Whisper APIs are also generally available, and we are releasing a deprecation plan for older models of the Completions API, which will retire at the beginning of 2024.
OpenAI Blog
Dec 11, 2025
Introducing GPT-5.2
GPT-5. 2 is our most advanced frontier model for everyday professional work, with state-of-the-art reasoning, long-context understanding, coding, and vision.
OpenAI Blog
May 13, 2024
Introducing GPT-4o and more tools to ChatGPT free users
Introducing GPT-4o and more tools to ChatGPT free users We are launching our newest flagship model and making more capabilities available for free in ChatGPT.
OpenAI Blog
Apr 14, 2024
Introducing OpenAI Japan
We are excited to announce our first office in Asia and we’re releasing a GPT-4 custom model optimized for the Japanese language.
OpenAI Blog
Apr 20
OpenAI helps Hyatt advance AI among colleagues
Hyatt deploys ChatGPT Enterprise across its global workforce, using GPT-5. 4 and Codex to improve productivity, operations, and guest experiences.
OpenAI Blog
Nov 10, 2025
Free ChatGPT for transitioning U.S. servicemembers and veterans
OpenAI is offering U. S.
OpenAI Blog
Apr 24, 2025
New in ChatGPT for Business: April 2025
Watch hands-on demos of the lastest in ChatGPT for Business: o3, image generation, enhanced memory, and internal knowledge.
OpenAI Blog
Jun 26
Previewing GPT-5.6 Sol: a next-generation model
OpenAI previews GPT-5. 6 Sol, a next-generation model with stronger capabilities in coding, science, and cybersecurity, paired with its most advanced safety stack.
OpenAI Blog
Jan 16
Introducing ChatGPT Go, now available worldwide
ChatGPT Go is now available worldwide, offering expanded access to GPT-5. 2 Instant, higher usage limits, and longer memory—making advanced AI more affordable globally.