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Introducing our open weight decision model: GLiNER2.5-Decide

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Building the future of open weight language models

An applied research lab building specialized, open weight language models and the autonomous Fine-Tuning Agent.

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{
“type”: {
“label”:”prompt_injection”,”confidence”: 0.82
},
“safety”: {
“label”: “unsafe”, “confidence”: 0.97
}
}

{
“type”: {
“label”:”prompt_injection”,”confidence”:0.82
},
“safety”: {
“label”: “unsafe”, “confidence”: 0.97
}
}

Fast decision models

Running locally or via hosted API

Big ideas, tiny decision models.

Explore what you can build with GLiNER in the playground.

Big ideas, tiny decision models.

Explore what you can build with GLiNER in the playground.

Big ideas, tiny decision models.

Explore what you can build with GLiNER in the playground.

Use GLiNER

Fastino

Fastino and NVIDIA: co-developing Nemotron 3.5 Lightning variants for finance and healthcare.

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Technical insights behind our open-weights language model research.

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//FASTINO API

Inference and train GLiNER via one API

Call base GLiNER for entities, classification, and JSON. When you need more accuracy on your domain, fine-tune it on your data and serve it from the same endpoint.

Inference base GLiNER

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INFERENCE

FINE-TUNE

curl https://api.fastino.ai/v1/chat/completions \

-H "X-API-Key: $FASTINO_API_KEY" \

-H "Content-Type: application/json" \

-d '{

"model": "fastino/gliner2.5-multi-v1",

"messages": [{

"role": "user",

"content": "Refund request: the receipt is attached, the purchase was 10 days ago, and refunds are allowed within 30 days."

}],

"schema": {

"classifications": {

"decision": ["approve", "reject"]

}

"include_confidence": true

GLiNER2.5-Decide

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Fine-tune open weight models with the Fastino Fine-Tuning Agent

Deploy production-grade models that you own in hours, not weeks.

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