OpenAI announced it would remove GPT-4o and GPT-4.1 from the API on January 14, 2027

Archive entry: this covers an event from October 14, 2026, and we published it on November 8, 2026. The details come from sources dated at the time and may have changed since.

On October 14, 2026, OpenAI announced that its GPT-4 series models in the API, including GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini snapshots, would be removed on January 14, 2027. The notice appeared on the OpenAI API deprecations page.

What changed

• OpenAI announced the GPT-4 series deprecation on October 14, 2026, and said the models would be removed on January 14, 2027.
• The affected snapshots were gpt-4o-2024-08-06, gpt-4o-2024-11-20, gpt-4o-mini-2024-07-18, gpt-4.1-2025-04-14 and gpt-4.1-mini-2025-04-14.
• The recommended replacement for all of them was gpt-6-luna.
• Fine-tuned models based on these snapshots followed the same schedule.

What it meant for people building with AI

Production apps and fine-tunes that ran on GPT-4o and GPT-4.1 had three months, from October 14, 2026 to January 14, 2027, to migrate. Because fine-tuned models based on the listed snapshots followed the same schedule, teams with custom fine-tunes had the same deadline as teams calling the base models directly.

Migration target

OpenAI named gpt-6-luna as the recommended replacement for all of the listed snapshots. Applications that called those snapshots by name needed a replacement model before the removal date.

Sources

• Deprecations | OpenAI API (2026-10-14 notice) (OpenAI, October 14, 2026, official)

Written with AI assistance, strictly from the sources listed above. Before it went live, automated checks verified its dates, sources and every language edition.