AI EngineerGuide

GPT-4 0125 preview retirement date: March 26, 2026

Retired on March 26, 2026; requests to gpt-4-0125-preview now fail.

Retired on Mar 26, 2026retired
Provider
OpenAI
Model IDs affected
gpt-4-0125-preview, gpt-4-turbo-preview, gpt-4-turbo-preview-completions
Announced
September 26, 2025
Shutdown date
March 26, 2026
Replacement
gpt-5 or gpt-4.1*
Platforms
Dates apply to the OpenAI API. Fine-tuned models follow the same shutdown schedule as their base model. If you use OpenAI models through another platform, check that platform's own retirement schedule.
Source
Official OpenAI deprecations page (data last changed 2026-11-02, re-checked daily)
Subscribe to all shutdowns (.ics)

Migrating from GPT-4 0125 preview to GPT-5

Not yet reviewed. We haven't written model-specific migration notes for GPT-4 0125 preview yet. Start with the provider's official guidance and the replacement's model page, and use this general checklist:

  • Search your code, config and environment variables for gpt-4-0125-preview, gpt-4-turbo-preview, gpt-4-turbo-preview-completions.
  • Re-run your evaluation set against gpt-5 or gpt-4.1* before switching traffic.
  • Recount tokens with the new model's tokenizer and re-check max_tokens, context fit and cost.
  • Check tool calling, structured output and stop sequences on your real prompts.
  • Dates apply to the OpenAI API. Fine-tuned models follow the same shutdown schedule as their base model. If you use OpenAI models through another platform, check that platform's own retirement schedule.

Check your code before Mar 26

Lint a requestPaste an API request and see every field that will return a 400 on the new model, with a fixed request. Find every gpt-4-0125-preview in your codePaste code, config or an n8n workflow to list each retiring model ID by line.

Also shutting down on March 26, 2026

All model retirements · All OpenAI deprecations

FAQ

When was GPT-4 0125 preview retired?

GPT-4 0125 preview (gpt-4-0125-preview) was retired on the OpenAI API on March 26, 2026, according to the official OpenAI API deprecations page. Requests to it now fail.

What should I use instead of gpt-4-0125-preview?

The recommended replacement is gpt-5 or gpt-4.1*.

What happens to gpt-4-0125-preview requests after the shutdown date?

After a model is retired, API requests to it return an error. Move traffic to the replacement and test it on your own prompts before the date.

Does this date apply to Amazon Bedrock, Vertex AI or Azure?

Dates apply to the OpenAI API. Fine-tuned models follow the same shutdown schedule as their base model. If you use OpenAI models through another platform, check that platform’s own retirement schedule.

Which model IDs are affected?

All of these: gpt-4-0125-preview, gpt-4-turbo-preview, gpt-4-turbo-preview-completions.

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