Native JSON Mode
Guaranteed adherence to JSON schemas. The 4.1 nano model eliminates formatting errors in automated data pipelines and RPA workflows.
gpt-4.1-nano
The GPT 4.1 nano api delivers sub-second latency and high-throughput performance. Optimized for structured outputs and vision tasks, this gpt model provides a cost-effective alternative to larger LLMs without sacrificing technical reliability.
$ 0.07
$ 0.1
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$ 0.28
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API
Text To Text (Response)
curl --location 'https://gptproto.com/v1/responses' \
--header 'Authorization: GPTPROTO_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
"model": "gpt-4.1-nano",
"input": [
{
"role": "user",
"content": [
{
"type": "input_text",
"text": "Write a short poem about artificial intelligence and its impact on humanity."
}
]
}
]
}'
Text to Text (Chat)
curl --location 'https://gptproto.com/v1/chat/completions' \
--header 'Authorization: GPTPROTO_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
"model": "gpt-4.1-nano",
"messages": [
{
"role": "user",
"content": "Who are you?"
}
],
"stream": false
}'
GPT 4.1 Nano API Key Features
Technical highlights of the 4.1 nano architecture, designed for developers who need gpt power with minimal api overhead.
Efficient Tool Use
Tuned for single-turn tool calls with 15% fewer hallucinations than previous models. Ideal for gpt agent orchestration.
128k Context Window
Process extensive documents and long conversation histories within a single gpt 4.1 nano api request for better global coherence.
Sub-second Latency
Achieve TTFT under 150ms. This gpt 4.1 nano api is engineered for real-time interactions, autocomplete, and high-frequency chatbot responses.
Build with gpt 4.1 nano in Minutes
Follow these simple steps to set up your account, get credits, and start sending API requests to gpt 4.1 nano via GPT Proto.
Sign up
Create your free GPT Proto account to begin. You can set up an organization for your team at any time.
Top up
Your balance can be used across all models on the platform, including gpt 4.1 nano, giving you the flexibility to experiment and scale as needed.
Generate your API key
In your dashboard, create an API key — you'll need it to authenticate when making requests to gpt 4.1 nano.
Make your first API call