GPT-4.1 nano
API ID gpt-4.1-nano
gpt-4.1-nano is an OpenAI model, released April 2025. It has a 1,047,576-token context window and up to 32,768 output tokens. It takes image input and supports function calling and structured outputs. Standard price: from $0.10 input and from $0.40 output per 1M tokens.
- Status
- Deprecated
- Released
- April 2025
- Shutdown
- Oct 23, 2026
- Replacement
- GPT-5.6 Lunagpt-5.6-luna
It stops serving on October 23, 2026. Recommended replacement: gpt-5.6-luna.
How to migrate to GPT-5.6 Luna
Free tier: 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
Benchmarks
Scores as each source published themNo comparison. Pick a model to see the difference on each benchmark.
Arena
| Arena | GPT-4.1 nano | Rank | Date | Source |
|---|---|---|---|---|
TextBy category
| 1322 ±8 | 256 of 415 6,103 votes | Oct 13, 2026 | source |
| Text: Coding | 1373 ±19 | 239 of 410 807 votes | Oct 13, 2026 | source |
| Vision | 1089 ±18 | 137 of 165 1,211 votes | Oct 9, 2026 | source |
Rated as gpt-4.1-nano-2025-04-14. Ratings come from people voting between two anonymous answers; Text and Vision are style-controlled, as on arena.ai. Data: Arena (arena.ai), CC BY 4.0.
Epoch AI
| Benchmark | GPT-4.1 nano | Setting | Run | Source |
|---|---|---|---|---|
| GPQA Diamond | 48.9% | Apr 14, 2025 | source | |
| MATH Level 5 | 70.0% | Apr 14, 2025 | source | |
| OTIS Mock AIME 2024-2025 | 28.9% | Apr 14, 2025 | source | |
| SimpleQA Verified | 6.0% | Aug 31, 2026 | source |
Run independently by Epoch AI. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.
On cloud platforms
All platform dates| Platform | Platform ID | State | Shutdown | Time left | Replacement | Source |
|---|---|---|---|---|---|---|
| Microsoft Foundryversion 2025-04-14 | gpt-4.1-nano | Deprecated | Apr 14, 2027 | 181 days | — | source |
Microsoft Foundry (version 2025-04-14) retires this model 173 days after OpenAI's own API.
Read daily from each platform's own pages. The shutdown date and countdown on this page use OpenAI's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.
Aliases pointing here: gpt-4.1-nano (in place when tracking began (October 7, 2026))
Alias
All aliasesCurrently points to gpt-4.1-nano-2025-04-14 (in place when tracking began (October 7, 2026)).
Features
Compare models| Feature | Value | Since | Source |
|---|---|---|---|
| Structured outputsThe model can be held to a JSON schema you supply, so every reply parses without retries or cleanup. | Supported | in place when tracking began (October 6, 2026) | source |
| Function callingAlso called tool use. You describe functions; the model replies with a function name and arguments for your code to run, then uses the result. | Supported | in place when tracking began (October 6, 2026) | source |
| Prompt cachingA prompt prefix you send again and again (system prompt, documents, tools) is cached, so later requests cost less and start faster. | Supported | in place when tracking began (October 6, 2026) | source |
| Batch APISend many requests as one job that runs in the background, usually finished within 24 hours, at a lower price than live requests. | Supported | in place when tracking began (October 6, 2026) | source |
| Image inputImages such as screenshots, photos and charts can go in the prompt for the model to read. | Supported | in place when tracking began (October 6, 2026) | source |
| Fine-tuningYou can train your own version of the model on your examples through the company's API, then call it like any other model. | Supported | in place when tracking began (October 6, 2026) | source |
| Context windowThe most the model can work with in one request, in tokens: your prompt, conversation history and files. A token is about three-quarters of an English word. | 1,047,576 tokens | in place when tracking began (October 6, 2026) | source |
| Max output tokensThe longest reply the model can write in one response, in tokens. A token is about three-quarters of an English word. | 32,768 tokens | in place when tracking began (October 6, 2026) | source |
Not published by OpenAI: PDF input, Reasoning / thinking, Built-in web search, temperature parameter, top_p parameter, logprobs.
Price history
USD per 1M tokens, standard tierWe started recording this model's prices on Oct 1, 2026. The history grows with each daily check.
Show as a table
| From | Type | Price |
|---|---|---|
| Oct 1, 2026 | Input | $0.10 |
| Oct 1, 2026 | Output | $0.40 |
Prices
USD per 1M tokens, every type and band, by tier| Type | Band | Price $/1M | In effect |
|---|---|---|---|
| Standard | |||
| input | short context | $0.10 | |
| cached input | short context | $0.025 | |
| output | short context | $0.40 | |
| Batch | |||
| input | short context | $0.05 | |
| output | short context | $0.20 | |
| Fast | |||
| input | short context | $0.20 | |
| cached input | short context | $0.05 | |
| output | short context | $0.80 | |
Changelog
Changes we detected on OpenAI's pages- Platform date changed
Microsoft Foundry (version 2025-04-14) moved the shutdown date for gpt-4.1-nano from Oct 14, 2026 to Apr 14, 2027
Info
Counting to 8:00 pm ET on October 22, 2026, which is 00:00 UTC on October 23, 2026.
Email alerts
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Last checked · Sources: OpenAI deprecations, OpenAI pricing, OpenAI models