Function calling lets you create Gemini-based applications and agents that can interact with real-time information and services like databases, customer relationship management systems, and document repositories. This enhances your application's ability to provide relevant and contextual responses.
With supervised fine-tuning, you can use your own tuning dataset to improve the overall accuracy of your application's function calling-based responses.
Supported models
The following Gemini models support function calling tuning:
gemini-2.0-flash-001
Tuning dataset format
The fileUri for your fine-tuning dataset can be the URI for a file in a
Cloud Storage bucket, or it can be a publicly available HTTP or HTTPS URL.
To see the generic format example, see the dataset example for Gemini.
The following sections present examples of function calling datasets for use in creating a tuning job for function calling.
Tuning function calling to generate text
The following is an example of a dataset for tuning function calling to generate a single text response.
{
"system_instruction": {
"role": "system",
"parts": [
{
"text": "You are an assistant that helps users find the best product for them."
}
]
},
"contents": [
{
"role": "user",
"parts": [
{
"text": "Do you have the White Pixel 8 Pro 128GB in stock in the US?"
}
]
},
{
"role": "model",
"parts": [
{
"functionCall": {
"name": "get_product_sku",
"args": {
"product_name": "Pixel 8 Pro 128GB"
}
}
}
]
}
],
"tools": [
{
"functionDeclarations": [
{
"name": "get_product_sku",
"description": "Get the available inventory for a Google products, e.g: Pixel phones, Pixel Watches, Google Home etc",
"parameters": {
"type": "OBJECT",
"properties": {
"product_name": {
"type": "STRING",
"description": "Product name",
"enum": [
"Pixel 8 Pro 128GB",
"Pixel 8 Pro 256GB",
"Pixel 8 Pro 512GB",
"Pixel 8 Pro 1TB"
]
}
}
}
},
{
"name": "get_store_location",
"description": "Get the location of the closest store",
"parameters": {
"type": "OBJECT",
"properties": {
"location": {
"type": "STRING",
"description": "Location"
}
}
}
}
]
}
]
}
Tuning function calling to support a chat session
The following is an example of a dataset for tuning function calling to support a chat session.
{
"system_instruction": {
"role": "system",
"parts": [
{
"text": "You are an assistant that helps users find the best product for them."
}
]
},
"contents": [
{
"role": "user",
"parts": [
{
"text": "Do you have the Porcelain Pixel 8 Pro 128GB in stock in the US?"
}
]
},
{
"role": "model",
"parts": [
{
"functionCall": {
"name": "get_product_sku",
"args": {
"product_name": "Pixel 8 Pro 128GB"
}
}
}
]
},
{
"parts": [
{
"functionResponse": {
"name": "get_product_sku",
"response": {
"output": "True"
}
}
}
]
},
{
"role": "model",
"parts": [
{
"text": "Yes, we have the Porcelain Pixel 8 Pro 128GB in stock in the US."
}
]
}
],
"tools": [
{
"functionDeclarations": [
{
"name": "get_product_sku",
"description": "Get the available inventory for a Google products, e.g: Pixel phones, Pixel Watches, Google Home etc",
"parameters": {
"type": "OBJECT",
"properties": {
"product_name": {
"type": "STRING",
"description": "Product name",
"enum": [
"Pixel 8 Pro 128GB",
"Pixel 8 Pro 256GB",
"Pixel 8 Pro 512GB",
"Pixel 8 Pro 1TB"
]
}
}
}
},
{
"name": "get_store_location",
"description": "Get the location of the closest store",
"parameters": {
"type": "OBJECT",
"properties": {
"location": {
"type": "STRING",
"description": "Location"
}
}
}
}
]
}
]
}
Tuning parallel function calling
The following is an example of a dataset for tuning parallel function calling.
{
"system_instruction": {
"role": "system",
"parts": [
{
"text": "You are an assistant that helps users find the best product for them."
}
]
},
"contents": [
{
"role": "user",
"parts": [
{
"text": "Where is the closest Google Store to Mountain View, CA that has Pixel 8 Pro 128GB in stock?"
}
]
},
{
"role": "model",
"parts": [
{
"functionCall": {
"name": "get_product_sku",
"args": {
"product_name": "Pixel 8 Pro 128GB"
}
}
},
{
"functionCall": {
"name": "get_store_location",
"args": {
"location": "Mountain View, CA"
}
}
}
]
}
],
"tools": [
{
"functionDeclarations": [
{
"name": "get_product_sku",
"description": "Get the available inventory for a Google products, e.g: Pixel phones, Pixel Watches, Google Home etc",
"parameters": {
"type": "OBJECT",
"properties": {
"product_name": {
"type": "STRING",
"description": "Product name",
"enum": [
"Pixel 8 Pro 128GB",
"Pixel 8 Pro 256GB",
"Pixel 8 Pro 512GB",
"Pixel 8 Pro 1TB"
]
}
}
}
},
{
"name": "get_store_location",
"description": "Get the location of the closest store",
"parameters": {
"type": "OBJECT",
"properties": {
"location": {
"type": "STRING",
"description": "Location"
}
}
}
}
]
}
]
}
What's next
- To learn how to create a tuning job and how to test the tuned model, see Tune Gemini models by using supervised fine-tuning.
- To learn about Gemini model tuning, see Introduction to tuning.
- To learn about function calling, see Introduction to function calling.