Migrating from ft-gpt-4.1-nano-2025-04-14 to gpt-5.6-luna
What changes when you move from ft-gpt-4.1-nano-2025-04-14 to gpt-5.6-luna: prices, limits, features and parameters, read from each company's own pages.
- Status
- Deprecated
- Shutdown
- Oct 23, 2026
- Time left
- 8 days
- Status
- Active
- Shutdown
- none announced
- Time left
- —
Prices
USD per 1M tokens, standard tier| Type | ft-gpt-4.1-nano-2025-04-14 | gpt-5.6-luna | Change |
|---|---|---|---|
| Input | Not published | $0.20first seen October 1, 2026 · source | — |
| Cached input | Not published | $0.02first seen October 1, 2026 · source | — |
| Output | Not published | $1.20first seen October 1, 2026 · source | — |
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | ft-gpt-4.1-nano-2025-04-14 | gpt-5.6-luna | Change |
|---|---|---|---|
| Context window | Not published | 1,050,000 tokensin place when tracking began (October 7, 2026) · source | — |
| Max output tokens | Not published | 128,000 tokensin place when tracking began (October 7, 2026) · source | — |
Features and parameters
Compare modelsNo feature is published for both models, so none can be compared.
Not published for ft-gpt-4.1-nano-2025-04-14: Structured outputs, Function calling, Prompt caching, Batch API, Image input, PDF input, Reasoning / thinking, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs, Context window, Max output tokens.
Not published for gpt-5.6-luna: PDF input, temperature parameter, top_p parameter, logprobs.
Free tier
ft-gpt-4.1-nano-2025-04-14: no free tier listed
gpt-5.6-luna: Free for shared data, 10M tokens a day for Launch and Grow (2.5M for Build), in place when tracking began (October 12, 2026) (source) · All free models
gpt-5.6-luna adds a free tier.
Aliases
All aliasesNo aliases point at either model.
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| gpt-5.6-luna | Amazon Bedrock | openai.gpt-5.6-luna | not before Jul 13, 2027Active | |
| gpt-5.6-luna | Microsoft Foundryversion 2026-07-09 | gpt-5.6-luna | Jan 11, 2028Active | 453 days |
Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.
Checklist
- Change the model string from
ft-gpt-4.1-nano-2025-04-14togpt-5.6-luna.
Counting to 8:00 pm ET on October 22, 2026, which is 00:00 UTC on October 23, 2026.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: ft-gpt-4.1-nano-2025-04-14, gpt-5.6-luna.