Migrating from gpt-4.1-nano to gpt-5-nano-2025-08-07
What changes when you move from gpt-4.1-nano to gpt-5-nano-2025-08-07: prices, limits, features and parameters, read from each company's own pages.
- From
- gpt-4.1-nano
- Status
- Deprecated
- Shutdown
- Oct 23, 2026
- Time left
- 8 days
- Status
- Deprecated
- Shutdown
- Dec 11, 2026
- Time left
- 57 days
gpt-5-nano-2025-08-07 is itself deprecated, shutting down Dec 11, 2026. Its replacement is gpt-5.6-luna.
Prices
USD per 1M tokens, standard tier| Type | gpt-4.1-nano | gpt-5-nano-2025-08-07 | Change |
|---|---|---|---|
| Input | $0.10first seen October 1, 2026 · source | Not published | — |
| Cached input | $0.025first seen October 1, 2026 · source | Not published | — |
| Output | $0.40first seen October 1, 2026 · source | Not published | — |
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | gpt-4.1-nano | gpt-5-nano-2025-08-07 | Change |
|---|---|---|---|
| Context window | 1,047,576 tokensin place when tracking began (October 6, 2026) · source | Not published | — |
| Max output tokens | 32,768 tokensin place when tracking began (October 6, 2026) · source | Not published | — |
Benchmarks
Same benchmark and source on both sides; settings named where they differ| Benchmark | gpt-4.1-nano | gpt-5-nano-2025-08-07 | Change |
|---|---|---|---|
GPQA DiamondEpoch AI, high effort (vs no setting).Other settings
| 48.9% | 69.4% | +20.5 pts |
MATH Level 5Epoch AI, medium effort (vs no setting).Other settings
| 70.0% | 95.2% | +25.2 pts |
OTIS Mock AIME 2024-2025Epoch AI, high effort (vs no setting).Other settings
| 28.9% | 81.1% | +52.2 pts |
| SimpleQA VerifiedEpoch AI, high effort (vs no setting). | 6.0% | 11.7% | +5.7 pts |
A score from one source is never compared with another source's, and company-reported scores are compared only within the same company; settings named where they differ. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.
Features and parameters
Compare modelsNo feature is published for both models, so none can be compared.
Not published for gpt-4.1-nano: PDF input, Reasoning / thinking, Built-in web search, temperature parameter, top_p parameter, logprobs.
Not published for gpt-5-nano-2025-08-07: 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.
Free tier
gpt-4.1-nano: 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)
gpt-5-nano-2025-08-07: 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
Aliases
All aliasesAliases pointing at gpt-4.1-nano: gpt-4.1-nano (in place when tracking began (October 7, 2026) · source)
Aliases pointing at gpt-5-nano-2025-08-07: gpt-5-nano (in place when tracking began (October 7, 2026) · source)
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| gpt-4.1-nano | Microsoft Foundryversion 2025-04-14 | gpt-4.1-nano | Apr 14, 2027Deprecated | 181 days |
| gpt-5-nano-2025-08-07 | Microsoft Foundryversion 2025-08-07 | gpt-5-nano | Feb 9, 2027Active | 117 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
gpt-4.1-nanotogpt-5-nano-2025-08-07.
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: gpt-4.1-nano, gpt-5-nano-2025-08-07.