WhichBot › What replaced it › What replaces GPT-4o?
Last checked Oct 28, 2026 · plain English · no paid picks
What replaces GPT-4o?
Short answer: GPT-6 Luna. On Oct 14, 2026, OpenAI announced it's retiring the GPT-4o versions that developers use, with a shutdown on Jan 14, 2027. The oldest version (from May 2024) already shut down Oct 23, 2026.
What to do: If you build on GPT-4o, switch to GPT-6 Luna before Jan 14, 2027.
The facts
| Old | GPT-4o |
|---|---|
| Status | Retiring. Retirement announced Oct 14, 2026; developer service shutdown Jan 14, 2027 (the 2024-05-13 version was shut down Oct 23, 2026) |
| Replaced by | GPT-6 Luna |
| Official source | platform.openai.com |
| Last checked | Oct 28, 2026 |
The replacement at a glance
| GPT-6 Luna | |
|---|---|
| What it is | OpenAI's low-cost model |
| Made by | OpenAI |
| Price | Developer price: $0.10 in and $0.50 out per million tokens |
| Good at | Best for: cheap, light tasks; Reads up to 1,050,000 tokens at once; Reads: text, image, PDFs |
| Where it runs | ChatGPT Go |
| Status | Current. Named replacement for GPT-4o / 4.1 family |
| Sources | platform.openai.com · chatgpt.com · models.dev |
Related pages
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- What replaced GPT-5.5?
- What replaces GPT-5.1?
Questions people ask
What replaces GPT-4o?
GPT-6 Luna. On Oct 14, 2026, OpenAI announced it's retiring the GPT-4o versions that developers use, with a shutdown on Jan 14, 2027. The oldest version (from May 2024) already shut down Oct 23, 2026.
What should I do if I used GPT-4o?
If you build on GPT-4o, switch to GPT-6 Luna before Jan 14, 2027.
Facts come from the companies' own pages, linked above, and were last checked Oct 28, 2026. Prices are US and can change. Picks are Hector's: no paid picks, sponsors always labeled, and no sponsorship from AI labs. Our policy.