# GPT-4o Leaves ChatGPT — Product Hygiene Locks Consumers onto 5.x

Times of AI Desk · 2026-01-29 · Products

[https://timesof.ai/2026/01/openai-retires-gpt-4o-and-older-chatgpt-models](https://timesof.ai/2026/01/openai-retires-gpt-4o-and-older-chatgpt-models)

> OpenAI (Jan 29) said GPT-4o, GPT-4.1, GPT-4.1 mini, and o4-mini leave ChatGPT on Feb 13—with previously announced GPT-5 Instant/Thinking retirements. ~0.1% of users still choosing GPT-4o daily; migration to GPT-5.2. API availability unchanged at announcement. Fewer serving stacks, clearer default UX.

Model retirement is product **hygiene and cost control**: fewer parallel serving stacks, clearer defaults, pressure on users pinned to older “personality” models. OpenAI’s proprietary close of the post-GPT-4 consumer chapter: **ChatGPT locks onto the 5.x generation**.

**OpenAI** on January 29 announced that **GPT‑4o**, **GPT‑4.1**, **GPT‑4.1 mini**, and **OpenAI o4-mini** will leave **ChatGPT** on **February 13, 2026**, joining the already planned retirement of **GPT‑5 Instant and Thinking**. Rationale: improvements on newer models; usage concentrated on **GPT‑5.2**; only ~**0.1%** of users still picking GPT‑4o each day (company). **API** model availability **unchanged** at announcement—developers continue under separate deprecation schedules if any. Roughly two weeks for power users still pinned to 4o-class pickers to migrate habits.

## Claims vs checks

Retirement list, effective date, and 0.1% figure are **OpenAI primary**. “Vast majority on 5.2” is company usage telemetry—not a public dashboard. API “no change” is announcement-time only; watch separate deprecation notices.

## Limits

- ChatGPT picker ≠ API catalog.
- Personality preference is real for a small cohort—0.1% can still be loud.
- Downstream apps hard-coded to 4o chat behavior need their own migration plans.

## Sources

- OpenAI: [“Retiring GPT‑4o, GPT‑4.1, GPT‑4.1 mini, and OpenAI o4-mini in ChatGPT”](https://openai.com/index/retiring-gpt-4o-and-older-models) (January 29, 2026). Primary.