The latest Gemini models, like Gemini 3.1 Flash Image (Nano Banana 2), are available to use with Firebase AI Logic! Learn more.

Gemini 2.0 Flash and Flash-Lite models will shut down on June 1, 2026. To avoid service disruption, update to a newer model like gemini-2.5-flash-lite. Learn more.

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代码执行

代码执行是一种工具，可让模型生成和运行 Python 代码。模型可以从代码执行结果中迭代学习，直到获得最终输出。

您可以使用代码执行来构建可受益于基于代码的推理并生成文本输出的功能。例如，您可以使用代码执行来求解方程式或处理文本。您还可以使用库来执行代码执行环境中包含的更专业的任务。

与您提供给模型的所有工具一样，模型会决定何时使用代码执行。

跳转到代码实现

代码执行与函数调用的比较

代码执行和函数调用是类似的功能。通常，如果模型可以处理您的应用场景，则您应优先使用代码执行功能。代码执行也更易使用，因为您只需启用即可。

以下是代码执行与函数调用之间的一些其他区别：

代码执行	函数调用
如果您希望模型为您编写和运行 Python 代码并返回相应结果，请使用代码执行功能。	如果您已有要在本地运行的自己的函数，请使用函数调用功能。
通过代码执行，模型可以在固定的隔离环境的 API 后端中运行代码。	通过函数调用，您可以在所需的任何环境中运行模型请求的函数。
代码执行会在单个请求中进行解析。虽然您可以选择将代码执行与聊天功能搭配使用，但这不是必需的。	函数调用需要额外的请求才能将每次函数调用的输出结果发送回去。因此，您必须使用聊天功能。

支持的模型

gemini-3.1-pro-preview
gemini-3-flash-preview
gemini-3.1-flash-lite-preview
gemini-2.5-pro
gemini-2.5-flash
gemini-2.5-flash-lite

使用代码执行

您可以将代码执行与纯文本和多模态输入搭配使用，但响应将始终仅为文本或代码。

准备工作

点击您的 Gemini API 提供商，以查看此页面上特定于提供商的内容和代码。

如果您尚未完成，请完成入门指南，其中介绍了如何设置 Firebase 项目、将应用连接到 Firebase、添加 SDK、为所选的 Gemini API 提供方初始化后端服务，以及创建 GenerativeModel 实例。

如需测试和迭代提示，我们建议使用 Google AI Studio。

启用代码执行

在尝试此示例之前，请完成本指南的准备工作部分，以设置您的项目和应用。
在该部分中，您还需要点击所选 Gemini API提供商的按钮，以便在此页面上看到特定于提供商的内容。

创建 GenerativeModel 实例时，请提供 CodeExecution 作为模型可用于生成响应的工具。这样，模型就可以生成和运行 Python 代码。

Swift


import FirebaseAILogic

// Initialize the Gemini Developer API backend service
let ai = FirebaseAI.firebaseAI(backend: .googleAI())

// Create a `GenerativeModel` instance with a model that supports your use case
let model = ai.generativeModel(
  modelName: "GEMINI_MODEL_NAME",
  // Provide code execution as a tool that the model can use to generate its response.
  tools: [.codeExecution()]
)

let prompt = """
What is the sum of the first 50 prime numbers?
Generate and run code for the calculation, and make sure you get all 50.
"""

let response = try await model.generateContent(prompt)

guard let candidate = response.candidates.first else {
  print("No candidates in response.")
  return
}
for part in candidate.content.parts {
  if let textPart = part as? TextPart {
    print("Text = \(textPart.text)")
  } else if let executableCode = part as? ExecutableCodePart {
    print("Code = \(executableCode.code), Language = \(executableCode.language)")
  } else if let executionResult = part as? CodeExecutionResultPart {
    print("Outcome = \(executionResult.outcome), Result = \(executionResult.output ?? "no output")")
  }
}

Kotlin


// Initialize the Gemini Developer API backend service
// Create a `GenerativeModel` instance with a model that supports your use case
val model = Firebase.ai(backend = GenerativeBackend.googleAI()).generativeModel(
    modelName = "GEMINI_MODEL_NAME",
    // Provide code execution as a tool that the model can use to generate its response.
    tools = listOf(Tool.codeExecution())
)

val prompt =  "What is the sum of the first 50 prime numbers? " +
        "Generate and run code for the calculation, and make sure you get all 50."

val response = model.generateContent(prompt)

response.candidates.first().content.parts.forEach {
    if(it is TextPart) {
        println("Text = ${it.text}")
    }
    if(it is ExecutableCodePart) {
        println("Code = ${it.code}, Language = ${it.language}")
    }
    if(it is CodeExecutionResultPart) {
       println("Outcome = ${it.outcome}, Result = ${it.output}")
    }
}

Java


// Initialize the Gemini Developer API backend service
// Create a `GenerativeModel` instance with a model that supports your use case
GenerativeModel ai = FirebaseAI.getInstance(GenerativeBackend.googleAI())
                .generativeModel("GEMINI_MODEL_NAME",
                        null,
                        null,
                        // Provide code execution as a tool that the model can use to generate its response.
                        List.of(Tool.codeExecution()));

// Use the GenerativeModelFutures Java compatibility layer which offers
// support for ListenableFuture and Publisher APIs
GenerativeModelFutures model = GenerativeModelFutures.from(ai);

String text = "What is the sum of the first 50 prime numbers? " +
        "Generate and run code for the calculation, and make sure you get all 50.";

Content prompt = new Content.Builder()
    .addText(text)
    .build();

ListenableFuture response = model.generateContent(prompt);

Futures.addCallback(response, new FutureCallback() {
   @Override
public void onSuccess(GenerateContentResponse response)   {
    // Access the first candidate's content parts
    List parts = response.getCandidates().get(0).getContent().getParts();
    for (Part part : parts) {
        if (part instanceof TextPart) {
            TextPart textPart = (TextPart) part;
            System.out.println("Text = " + textPart.getText());
        } else if (part instanceof ExecutableCodePart) {
            ExecutableCodePart codePart = (ExecutableCodePart) part;
            System.out.println("Code = " + codePart.getCode() + ", Language = " + codePart.getLanguage());
        } else if (part instanceof CodeExecutionResultPart) {
            CodeExecutionResultPart resultPart = (CodeExecutionResultPart) part;
            System.out.println("Outcome = " + resultPart.getOutcome() + ", Result = " + resultPart.getOutput());
        }
    }
}

    @Override
    public void onFailure(Throwable t) {
        t.printStackTrace();
    }
}, executor);

Web


import { initializeApp } from "firebase/app";
import { getAI, getGenerativeModel, GoogleAIBackend } from "firebase/ai";

// TODO(developer) Replace the following with your app's Firebase configuration
// See: https://firebase.google.com/docs/web/learn-more#config-object
const firebaseConfig = {
  // ...
};

// Initialize FirebaseApp
const firebaseApp = initializeApp(firebaseConfig);

// Initialize the Gemini Developer API backend service
const ai = getAI(firebaseApp, { backend: new GoogleAIBackend() });

// Create a `GenerativeModel` instance with a model that supports your use case
const model = getGenerativeModel(
  ai,
  {
    model: "GEMINI_MODEL_NAME",
    // Provide code execution as a tool that the model can use to generate its response.
    tools: [{ codeExecution: {} }]
  }
);

const prompt =  "What is the sum of the first 50 prime numbers? " +
        "Generate and run code for the calculation, and make sure you get all 50."

const result = await model.generateContent(prompt);
const response = await result.response;

const parts = response.candidates?.[0].content.parts;

if (parts) {
  parts.forEach((part) => {
    if (part.text) {
        console.log(`Text: ${part.text}`);
    } else if (part.executableCode) {
      console.log(
        `Code: ${part.executableCode.code}, Language: ${part.executableCode.language}`
      );
    } else if (part.codeExecutionResult) {
      console.log(
        `Outcome: ${part.codeExecutionResult.outcome}, Result: ${part.codeExecutionResult.output}`
      );
    }
  });
}

Dart


import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_ai/firebase_ai.dart';
import 'firebase_options.dart';

// Initialize FirebaseApp
await Firebase.initializeApp(
  options: DefaultFirebaseOptions.currentPlatform,
);

// Initialize the Gemini Developer API backend service
// Create a `GenerativeModel` instance with a model that supports your use case
final model = FirebaseAI.googleAI().generativeModel(
  model: 'GEMINI_MODEL_NAME',
  // Provide code execution as a tool that the model can use to generate its response.
  tools: [
    Tool.codeExecution(),
  ],
);

const prompt = 'What is the sum of the first 50 prime numbers? '
    'Generate and run code for the calculation, and make sure you get all 50.';

final response = await model.generateContent([Content.text(prompt)]);

final buffer = StringBuffer();
    for (final part in response.candidates.first.content.parts) {
      if (part is TextPart) {
        buffer.writeln(part.text);
      } else if (part is ExecutableCodePart) {
        buffer.writeln('Executable Code:');
        buffer.writeln('Language: ${part.language}');
        buffer.writeln('Code:');
        buffer.writeln(part.code);
      } else if (part is CodeExecutionResultPart) {
        buffer.writeln('Code Execution Result:');
        buffer.writeln('Outcome: ${part.outcome}');
        buffer.writeln('Output:');
        buffer.writeln(part.output);
      }
    }

Unity


using Firebase;
using Firebase.AI;

// Initialize the Gemini Developer API backend service
var ai = FirebaseAI.GetInstance(FirebaseAI.Backend.GoogleAI());

// Create a `GenerativeModel` instance with a model that supports your use case
var model = ai.GetGenerativeModel(
  modelName: "GEMINI_MODEL_NAME",
  // Provide code execution as a tool that the model can use to generate its response.
  tools: new Tool[] { new Tool(new CodeExecution()) }
);

var prompt = "What is the sum of the first 50 prime numbers? " +
        "Generate and run code for the calculation, and make sure you get all 50.";

var response = await model.GenerateContentAsync(prompt);

foreach (var part in response.Candidates.First().Content.Parts) {
  if (part is ModelContent.TextPart tp) {
    UnityEngine.Debug.Log($"Text = {tp.Text}");
  } else if (part is ModelContent.ExecutableCodePart esp) {
    UnityEngine.Debug.Log($"Code = {esp.Code}, Language = {esp.Language}");
  } else if (part is ModelContent.CodeExecutionResultPart cerp) {
    UnityEngine.Debug.Log($"Outcome = {cerp.Outcome}, Output = {cerp.Output}");
  }
}

了解如何选择适合您的应用场景和应用的模型，以及选择性地选择模型位置。

查看输出示例

输出可能如下所示，为了便于阅读，我们对其进行了格式化：

Okay, I need to calculate the sum of the first 50 prime numbers. Here's how I'll
approach this:

1.  **Generate Prime Numbers:** I'll use an iterative method to find prime
    numbers. I'll start with 2 and check if each subsequent number is divisible
    by any number between 2 and its square root. If not, it's a prime.
2.  **Store Primes:** I'll store the prime numbers in a list until I have 50 of
    them.
3.  **Calculate the Sum:**  Finally, I'll sum the prime numbers in the list.

Here's the Python code to do this:

def is_prime(n):
  """Efficiently checks if a number is prime."""
  if n <= 1:
    return False
  if n <= 3:
    return True
  if n % 2 == 0 or n % 3 == 0:
    return False
  i = 5
  while i * i <= n:
    if n % i == 0 or n % (i + 2) == 0:
      return False
    i += 6
  return True

primes = []
num = 2
while len(primes) < 50:
  if is_prime(num):
    primes.append(num)
  num += 1

sum_of_primes = sum(primes)
print(f'{primes=}')
print(f'{sum_of_primes=}')

primes=[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67,
71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151,
157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229]
sum_of_primes=5117

The sum of the first 50 prime numbers is 5117.

此输出结合了模型在使用代码执行时返回的多个内容部分：

text：模型生成的内嵌文本
executableCode：模型生成的旨在执行的代码
codeExecutionResult：已执行代码的结果

这些部分的命名惯例因编程语言而异。

在对话中使用代码执行

您还可以在对话中使用代码执行功能：

Swift


import FirebaseAILogic

// Initialize the Gemini Developer API backend service
let ai = FirebaseAI.firebaseAI(backend: .googleAI())

// Create a `GenerativeModel` instance with a model that supports your use case
let model = ai.generativeModel(
  modelName: "GEMINI_MODEL_NAME",
  // Provide code execution as a tool that the model can use to generate its response.
  tools: [.codeExecution()]
)

let prompt = """
What is the sum of the first 50 prime numbers?
Generate and run code for the calculation, and make sure you get all 50.
"""
let chat = model.startChat()

let response = try await chat.sendMessage(prompt)

guard let candidate = response.candidates.first else {
  print("No candidates in response.")
  return
}
for part in candidate.content.parts {
  if let textPart = part as? TextPart {
    print("Text = \(textPart.text)")
  } else if let executableCode = part as? ExecutableCodePart {
    print("Code = \(executableCode.code), Language = \(executableCode.language)")
  } else if let executionResult = part as? CodeExecutionResultPart {
    print("Outcome = \(executionResult.outcome), Result = \(executionResult.output ?? "no output")")
  }
}

Kotlin


// Initialize the Gemini Developer API backend service
// Create a `GenerativeModel` instance with a model that supports your use case
val model = Firebase.ai(backend = GenerativeBackend.googleAI()).generativeModel(
    modelName = "GEMINI_MODEL_NAME",
    // Provide code execution as a tool that the model can use to generate its response.
    tools = listOf(Tool.codeExecution())
)

val prompt =  "What is the sum of the first 50 prime numbers? " +
        "Generate and run code for the calculation, and make sure you get all 50."
val chat = model.startChat()
val response = chat.sendMessage(prompt)

response.candidates.first().content.parts.forEach {
    if(it is TextPart) {
        println("Text = ${it.text}")
    }
    if(it is ExecutableCodePart) {
        println("Code = ${it.code}, Language = ${it.language}")
    }
    if(it is CodeExecutionResultPart) {
       println("Outcome = ${it.outcome}, Result = ${it.output}")
    }
}

Java


// Initialize the Gemini Developer API backend service
// Create a `GenerativeModel` instance with a model that supports your use case
GenerativeModel ai = FirebaseAI.getInstance(GenerativeBackend.googleAI())
                .generativeModel("GEMINI_MODEL_NAME",
                        null,
                        null,
                        // Provide code execution as a tool that the model can use to generate its response.
                        List.of(Tool.codeExecution()));

// Use the GenerativeModelFutures Java compatibility layer which offers
// support for ListenableFuture and Publisher APIs
GenerativeModelFutures model = GenerativeModelFutures.from(ai);
String text = "What is the sum of the first 50 prime numbers? " +
        "Generate and run code for the calculation, and make sure you get all 50.";

Content prompt = new Content.Builder()
    .addText(text)
    .build();

ChatFutures chat = model.startChat();
ListenableFuture response = chat.sendMessage(prompt);

Futures.addCallback(response, new FutureCallback() {
   @Override
public void onSuccess(GenerateContentResponse response)   {
    // Access the first candidate's content parts
    List parts = response.getCandidates().get(0).getContent().getParts();
    for (Part part : parts) {
        if (part instanceof TextPart) {
            TextPart textPart = (TextPart) part;
            System.out.println("Text = " + textPart.getText());
        } else if (part instanceof ExecutableCodePart) {
            ExecutableCodePart codePart = (ExecutableCodePart) part;
            System.out.println("Code = " + codePart.getCode() + ", Language = " + codePart.getLanguage());
        } else if (part instanceof CodeExecutionResultPart) {
            CodeExecutionResultPart resultPart = (CodeExecutionResultPart) part;
            System.out.println("Outcome = " + resultPart.getOutcome() + ", Result = " + resultPart.getOutput());
        }
    }
}

    @Override
    public void onFailure(Throwable t) {
        t.printStackTrace();
    }
}, executor);

Web


import { initializeApp } from "firebase/app";
import { getAI, getGenerativeModel, GoogleAIBackend } from "firebase/ai";

// TODO(developer) Replace the following with your app's Firebase configuration
// See: https://firebase.google.com/docs/web/learn-more#config-object
const firebaseConfig = {
  // ...
};

// Initialize FirebaseApp
const firebaseApp = initializeApp(firebaseConfig);

// Initialize the Gemini Developer API backend service
const ai = getAI(firebaseApp, { backend: new GoogleAIBackend() });

// Create a `GenerativeModel` instance with a model that supports your use case
const model = getGenerativeModel(
  ai,
  {
    model: "GEMINI_MODEL_NAME",
    // Provide code execution as a tool that the model can use to generate its response.
    tools: [{ codeExecution: {} }]
  }
);

const prompt =  "What is the sum of the first 50 prime numbers? " +
        "Generate and run code for the calculation, and make sure you get all 50."
const chat = model.startChat()
const result = await chat.sendMessage(prompt);

const parts = result.response.candidates?.[0].content.parts;

if (parts) {
  parts.forEach((part) => {
    if (part.text) {
        console.log(`Text: ${part.text}`);
    } else if (part.executableCode) {
      console.log(
        `Code: ${part.executableCode.code}, Language: ${part.executableCode.language}`
      );
    } else if (part.codeExecutionResult) {
      console.log(
        `Outcome: ${part.codeExecutionResult.outcome}, Result: ${part.codeExecutionResult.output}`
      );
    }
  });
}

Dart


import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_ai/firebase_ai.dart';
import 'firebase_options.dart';

// Initialize FirebaseApp
await Firebase.initializeApp(
  options: DefaultFirebaseOptions.currentPlatform,
);

// Initialize the Gemini Developer API backend service
// Create a `GenerativeModel` instance with a model that supports your use case
final model = FirebaseAI.googleAI().generativeModel(
  model: 'GEMINI_MODEL_NAME',
  // Provide code execution as a tool that the model can use to generate its response.
  tools: [
    Tool.codeExecution(),
  ],
);

final codeExecutionChat = await model.startChat();

const prompt = 'What is the sum of the first 50 prime numbers? '
    'Generate and run code for the calculation, and make sure you get all 50.';
final response = await codeExecutionChat.sendMessage(Content.text(prompt));

final buffer = StringBuffer();
    for (final part in response.candidates.first.content.parts) {
      if (part is TextPart) {
        buffer.writeln(part.text);
      } else if (part is ExecutableCodePart) {
        buffer.writeln('Executable Code:');
        buffer.writeln('Language: ${part.language}');
        buffer.writeln('Code:');
        buffer.writeln(part.code);
      } else if (part is CodeExecutionResultPart) {
        buffer.writeln('Code Execution Result:');
        buffer.writeln('Outcome: ${part.outcome}');
        buffer.writeln('Output:');
        buffer.writeln(part.output);
      }
    }

Unity


using Firebase;
using Firebase.AI;

// Initialize the Gemini Developer API backend service
var ai = FirebaseAI.GetInstance(FirebaseAI.Backend.GoogleAI());

// Create a `GenerativeModel` instance with a model that supports your use case
var model = ai.GetGenerativeModel(
  modelName: "GEMINI_MODEL_NAME",
  // Provide code execution as a tool that the model can use to generate its response.
  tools: new Tool[] { new Tool(new CodeExecution()) }
);

var prompt = "What is the sum of the first 50 prime numbers? " +
        "Generate and run code for the calculation, and make sure you get all 50.";
var chat = model.StartChat();
var response = await chat.SendMessageAsync(prompt);

foreach (var part in response.Candidates.First().Content.Parts) {
  if (part is ModelContent.TextPart tp) {
    UnityEngine.Debug.Log($"Text = {tp.Text}");
  } else if (part is ModelContent.ExecutableCodePart esp) {
    UnityEngine.Debug.Log($"Code = {esp.Code}, Language = {esp.Language}");
  } else if (part is ModelContent.CodeExecutionResultPart cerp) {
    UnityEngine.Debug.Log($"Outcome = {cerp.Outcome}, Output = {cerp.Output}");
  }
}

了解如何选择适合您的应用场景和应用的模型，以及选择性地选择模型位置。

价格

启用代码执行并将其作为工具提供给模型不会产生额外的费用。如果模型确实决定使用代码执行，那么系统会根据您使用的 Gemini 模型，按当前的输入和输出 token 费率向您收费。

下图展示了代码执行的结算模式：

图表：显示了模型使用代码执行功能时如何收取 token 费用。

以下是模型使用代码执行时 token 的结算方式摘要：

原始提示会结算一次。其 token 会被标记为中间 token，并会按 输入 token 计费。
生成的代码和已执行代码的结果的结算方式如下：
- 如果在代码执行期间使用，则会被标记为中间 token，并会按 输入 token 计费。
- 如果作为最终响应的一部分包含在内，则会按输出 token 计费。
最终响应中的最终摘要会按输出 token 计费。

Gemini API 在 API 响应中包含中间 token 数，因此您可以了解为何要为初始提示之外的输入 token 付费。

请注意，生成的代码可以包含文本和多模态输出结果（例如图片）。

限制和最佳做法

该模型只能生成和执行 Python 代码。它无法返回其他制品，例如媒体文件。
代码执行最长可运行 30 秒，超出这一时间即会超时。
在某些情况下，启用代码执行功能可能会导致模型输出的其他方面（例如，编写故事）出现回归问题。
代码执行工具不支持将文件 URI 作为输入或输出。不过，代码执行工具支持以内嵌字节的形式进行文件输入和图表输出。利用这些输入和输出功能，您可以上传 CSV 和文本文件，询问有关这些文件的问题，并让系统在代码执行结果中为您生成 Matplotlib 图表。内嵌字节支持的 MIME 类型包括 .cpp、.csv、.java、.jpeg、.js、.png、.py、.ts 和 .xml。

受支持的库

代码执行环境包含以下库。 您无法安装自己的库

查看 Gemini Developer API 支持的库

attrs
国际象棋
contourpy
fpdf
geopandas
imageio
jinja2
joblib
jsonschema
jsonschema-specifications
lxml
matplotlib
mpmath
numpy
opencv-python
openpyxl
打包
pandas
pillow
protobuf
pylatex
pyparsing
PyPDF2
python-dateutil
python-docx
python-pptx
reportlab
scikit-learn
scipy
seaborn
six
striprtf
sympy
tabulate
TensorFlow
toolz
xlrd

查看 Vertex AI Gemini API 支持的库

提供反馈有关您的使用体验Firebase AI Logic

代码执行 使用集合让一切井井有条 根据您的偏好保存内容并对其进行分类。

代码执行与函数调用的比较

支持的模型

使用代码执行

准备工作

启用代码执行

Swift

Kotlin

Java

Web

Dart

Unity

在对话中使用代码执行

Swift

Kotlin

Java

Web

Dart

Unity

价格

限制和最佳做法

受支持的库

代码执行