High-Fidelity Structured ai Output
Guarantees 100% JSON Schema adherence, making it perfect for reliable database updates and API integrations.

image
text
Image To Text (Response)
curl --request POST "https://gptproto.com/v1/responses" \
--header "Authorization: Bearer $GPTPROTO_API_KEY" \
--header "Content-Type: application/json" \
--data '{
"model": "gpt-4.1-mini-2025-04-14",
"input": [
{
"role": "user",
"content": [
{
"type": "input_text",
"text": "What is in this image?"
},
{
"type": "input_image",
"image_url": "https://tos.gptproto.com/resource/cat.png"
}
]
}
]
}'Image To Text (Chat)
curl --request POST "https://gptproto.com/v1/chat/completions" \
--header "Authorization: Bearer $GPTPROTO_API_KEY" \
--header "Content-Type: application/json" \
--data '{
"model": "gpt-4.1-mini-2025-04-14",
"messages": [
{
"role": "user",
"content": [
{
"type": "text",
"text": "What is in this image?"
},
{
"type": "image_url",
"image_url": {
"url": "https://tos.gptproto.com/resource/cat.png"
}
}
]
}
],
"max_tokens": 300
}'Key technical features that define the ai gpt 4.1 mini performance profile.
Guarantees 100% JSON Schema adherence, making it perfect for reliable database updates and API integrations.

Handles speech input and output natively to preserve emotional nuance and background acoustic context.

Efficiently calls multiple functions simultaneously to act as a fast router in complex agentic systems.

Processes video and images directly for spatial reasoning and high-accuracy OCR without intermediate steps.

Getting a gpt 4.1 mini 2025.04.14 API key takes four steps and a few minutes. Create a free GPTProto account, add credits, generate your key, and make your first call — at $0.28 / $0.07 it's a cheaper gpt 4.1 mini 2025.04.14 API key than going direct, and one key works across every model on the platform. Full gpt 4.1 mini 2025.04.14 Documentation is in the docs.

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