OpenAI will remove GPT-4o and GPT-4.1 from its API on 14 January 2027 and points developers to GPT-6 Luna
Four GPT-4-series model versions, including their mini variants and fine-tuned copies, are affected. OpenAI had already retired GPT-4o from ChatGPT in February.
Illustration · not a photoHow this story was checked
- ResearchedWith AI assistance · 4 sources
- AI source checkEach sentence matched to its source
- Editor approvalMayank Sahu · 15 Oct, 11:55
- Published15 Oct, 11:55
Verify this story
- 4 sources, 3 official · 4 with an archived copy · see sources
- Every fact has a label and a source number · fact ledger
- What we searched, read and could not verify · research note
- Machine-readable: facts as JSON · text as Markdown
How this was made: researched, drafted and source-checked by AI (Claude, made by Anthropic), then published under the editor’s standing approval. A person did not read it line by line before it went live. AI policy
In short
OpenAI said on 14 October 2026 that it will remove GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini from its API on 14 January 2027. It recommends gpt-6-luna as the replacement for all four. Fine-tuned versions of these models follow the same shutdown date.
What OpenAI announced
OpenAI’s deprecations page says that on 14 October 2026 it notified developers using certain GPT-4-series models that they will be removed from the API on 14 January 2027.1 The affected model versions are:1
- gpt-4o-2024-08-06 and gpt-4o-2024-11-20
- gpt-4o-mini-2024-07-18
- gpt-4.1-2025-04-14
- gpt-4.1-mini-2025-04-14
Fine-tuned models built on these versions follow the same shutdown schedule as their base models.13
The recommended replacement
OpenAI recommends gpt-6-luna for all four.1 Its pricing page lists gpt-6-luna at $0.10 per million input tokens, $0.01 per million cached input tokens and $0.50 per million output tokens on the standard tier.2 Shelly Palmer notes that OpenAI advises developers to measure total cost on their own workloads, because token use and reasoning settings affect the bill.3
Other OpenAI shutdowns already scheduled
The same page lists two notices from 1 October 2026: gpt-5.1, gpt-5.3-codex and gpt-5.4-nano will be removed on 1 April 2027, and the text-to-speech models tts-1, tts-1-hd and two gpt-4o-mini-tts versions on 6 January 2027.1
Background
GPT-4o has already left ChatGPT. OpenAI retired GPT-4o, GPT-4.1, GPT-4.1 mini and o4-mini from ChatGPT on 13 February 2026, and said at the time that there were no changes in the API.4
What developers should do
Developers still calling these model versions have about three months to move. Shelly Palmer’s advice is to test representative workloads, check output formats and tool use, and shift production traffic gradually.3
Fact ledger
How labels workTracked from this story
All trackersRemove GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini versions from its API
Pending Follow it| Model | Tier | Input | Output | From | Label |
|---|---|---|---|---|---|
| gpt-6-luna | Standard | $0.10 | $0.50 | 15 Oct 2026 | Confirmed |
Questions readers ask
When will GPT-4o stop working in the API?
On 14 January 2027, for the versions gpt-4o-2024-08-06 and gpt-4o-2024-11-20, according to OpenAI’s deprecations page.
What should I switch to?
OpenAI recommends gpt-6-luna for GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini.
What happens to my fine-tuned GPT-4o model?
Fine-tuned models follow the shutdown date of the model they were built on.