GPT-4.1 Nano API

openai/gpt-4.1-nano-2025-04-14
Ultra-fast, cost-efficient AI with million-token context for lightweight applications.
Context
1M tokens
Input
$0.13 / 1M tokens
Output
$0.52 / 1M tokens
Released
Aug 7, 2025

How to use GPT-4.1 Nano API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to openai/gpt-4.1-nano-2025-04-14.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "openai/gpt-4.1-nano-2025-04-14",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ]
    },
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "openai/gpt-4.1-nano-2025-04-14",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ]
  }),
});
console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/gpt-4.1-nano-2025-04-14","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

GPT-4.1 Nano API Pricing

TypePrice
Input
$0.13 / 1M tokens
Output
$0.52 / 1M tokens
Cached input
$0.0325 / 1M tokens

GPT-4.1 Nano Benchmarks

BenchmarkScoreWhat it measuresSourceRetrieved
GPQA Diamond
50.3%
Google-proof graduate science questions (hardest subset)SourceJuly 12, 2026
Intelligence
7.8
Composite score across standardised reasoning, knowledge and problem-solving evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026
Coding
11.1
Composite score across standardised coding evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026
Math
24
Composite score across standardised mathematics evaluations, measured independently by Artificial AnalysisSourceSeptember 12, 2026

GPT-4.1 Nano vs other models

ModelInputOutputContextBest for
GPT-4.1 Nano
This page
$0.13 / 1M tokens
$0.52 / 1M tokens
1M tokens
Coding + agents
$6.5 / 1M tokens
$39 / 1M tokens
1.05M tokens
Reasoning + agents
$2.6 / 1M tokens
$13 / 1M tokens
1M tokens
Balanced coding + agents
$3.9 / 1M tokens
$19.5 / 1M tokens
1M tokens
Long-context, multimodal & agentic workflows
$0.65 / 1M tokens
$3.9 / 1M tokens
1.05M tokens
Reasoning + agents

Frequently asked questions

GPT-4.1 Nano has a 1,000,000 tokens context window.

GPT-4.1 Nano takes image, text as input and returns text.

Use openai/gpt-4.1-nano-2025-04-14 as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

GPT-4.1 Nano became available on August 7, 2025.

GPT-4.1 Nano is priced at input $0.13 / 1M tokens, output $0.52 / 1M tokens, cached input $0.0325 / 1M tokens.

Yes, GPT-4.1 Nano can stream responses as they are generated.

Yes, GPT-4.1 Nano accepts image input alongside text.

GPT-4.1 Nano was built by OpenAI.

Yes, it supports function calling, tool use, and parallel tool calls.

Yes, reasoning is listed among its capabilities.

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