GPT-4.1 Nano

About GPT-4.1 Nano

GPT-4 is OpenAI's groundbreaking large language model that redefined AI capabilities when released in March 2023. As the successor to GPT-3.5, it demonstrated unprecedented performance in reasoning, creativity, and instruction following, passing the bar exam in the 90th percentile and achieving expert-level scores on numerous professional benchmarks. GPT-4 features an 8K context window (with a 32K variant available) and excels at complex problem-solving, nuanced content generation, and sophisticated code development. The model introduced significant improvements in factual accuracy, reduced hallucinations, and better alignment with human intent. GPT-4 supports system prompts for customizing behavior, making it highly adaptable for diverse applications from customer service to research assistance. While newer models like GPT-4 Turbo and GPT-4o offer better cost-efficiency and additional features, GPT-4 remains a benchmark for AI capability and continues to power many production applications. It's particularly valued for tasks requiring careful reasoning, professional writing, and complex analysis where its deliberate, thorough approach provides advantages over faster but potentially less careful alternatives.

Model Specifications

💰 Real-World Cost Examples

Estimated monthly costs for common use cases

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🚀 Quick Start

Get started with GPT-4.1 Nano API

from openai import OpenAI
client = OpenAI()

response = client.chat.completions.create(
    model="openai/gpt-4.1-nano-2025-04-14",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)

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