GPT-4o and o4-mini Are Gone from ChatGPT by February 2026

If your team built internal workflows around specific ChatGPT models, those workflows have an expiration date.

Four models in active use are being cut on the same day

Millions of professionals rely on specific ChatGPT model versions because they behave predictably inside established processes. Swapping a model mid-workflow is not a small lift when prompts, outputs, and downstream tools were tuned to one model’s behavior.

OpenAI is collapsing its ChatGPT model menu in one move

Retiring GPT is retiring GPT-4o, GPT-4.1, GPT-4.1 mini, and o4-mini from ChatGPT on February 13, 2026, the same date GPT-5 variants (Instant, Thinking, and Pro) are also being removed. Users who currently select these models inside ChatGPT will lose access to them entirely. Critically, the API is not affected at this time, so developers calling these models programmatically have no immediate deadline.

ChatGPT power users are the first to absorb this friction

  • Prompt engineers who tuned workflows to GPT-4.1’s specific instruction-following behavior and now need to revalidate every output against a replacement model.
  • Operations leads who built repeatable ChatGPT-based SOPs around o4-mini’s cost-to-quality ratio and must retest before the retirement date.
  • AI tool evaluators at mid-size companies who benchmark model performance internally and now have a hard deadline forcing a new round of testing.

The API carve-out is the detail that separates casual ChatGPT users from professional ones.

OpenAI is betting users will move up, not sideways

This retirement follows a pattern OpenAI has accelerated in 2025: consolidating the model menu to push users toward GPT-5 and away from older, cheaper options that complicate positioning against Anthropic’s Claude and Google’s Gemini. Teams that stay on ChatGPT without auditing their model dependencies before February 13 will hit broken workflows with no grace period.

What you should do before February 13, 2026

  • Audit every saved ChatGPT workflow that targets a named model version.
  • Test your highest-volume prompts against the GPT-5 tier now, before the deadline.
  • Confirm API integrations are unaffected and document which endpoints you call.
  • Flag the February 13 date in project management tools tied to AI-dependent deliverables.

Free for ChatGPT users until the retirement date; post-February access depends on your current subscription tier.

The API exemption will not last indefinitely

OpenAI has not announced API deprecation for these models, but its historical pattern is to follow ChatGPT retirements with API sunset notices within months, so building on these endpoints now carries real technical debt risk.

If you need a model with similar cost efficiency to o4-mini, Anthropic’s Claude Haiku and Google’s Gemini Flash are the two most direct comparisons currently available.

The ChatGPT model menu is shrinking faster than most teams are tracking

We track every retirement, release, and pricing shift across the major AI platforms so you do not have to check five sources on a Friday afternoon. We cover tools like this every Friday — subscribe here and we’ll send the best ones straight to you.