本快速入門說明如何安裝程式庫,並發出第一個 Gemini API 要求。
事前準備
您需要 Gemini API 金鑰。如果您還沒有金鑰,可以在 Google AI Studio 免費取得。
安裝 Google Gen AI SDK
Python
使用 Python 3.9 以上版本,請使用以下 pip 指令安裝 google-genai
套件:
pip install -q -U google-genai
JavaScript
使用 Node.js 18 以上版本,請使用下列 npm 指令安裝 Google Gen AI SDK for TypeScript and JavaScript:
npm install @google/genai
Go
使用 go get 指令在模組目錄中安裝 google.golang.org/genai:
go get google.golang.org/genai
Java
如果您使用 Maven,可以將下列依附元件新增至依附元件,以便安裝 google-genai:
<dependencies> <dependency> <groupId>com.google.genai</groupId> <artifactId>google-genai</artifactId> <version>1.0.0</version> </dependency> </dependencies>
Apps Script
- 如要建立新的 Apps Script 專案,請前往 script.new。
- 按一下「Untitled project」。
- 重新命名 Apps Script 專案「AI Studio」,然後按一下「Rename」。
- 設定 API 金鑰
- 按一下左側的「專案設定」圖示
。
- 在「指令碼屬性」下方,按一下「新增指令碼屬性」。
- 在「Property」中輸入鍵名:
GEMINI_API_KEY
。 - 在「Value」 中輸入 API 金鑰的值。
- 按一下「儲存指令碼屬性」。
- 按一下左側的「專案設定」圖示
- 使用下列程式碼取代
Code.gs
檔案內容:
提出第一個要求
以下範例使用 generateContent
方法,透過 Gemini 2.5 Flash 模型傳送要求至 Gemini API。
Python
from google import genai client = genai.Client(api_key="YOUR_API_KEY") response = client.models.generate_content( model="gemini-2.5-flash", contents="Explain how AI works in a few words" ) print(response.text)
JavaScript
import { GoogleGenAI } from "@google/genai"; const ai = new GoogleGenAI({ apiKey: "YOUR_API_KEY" }); async function main() { const response = await ai.models.generateContent({ model: "gemini-2.5-flash", contents: "Explain how AI works in a few words", }); console.log(response.text); } main();
Go
package main import ( "context" "fmt" "log" "google.golang.org/genai" ) func main() { ctx := context.Background() client, err := genai.NewClient(ctx, &genai.ClientConfig{ APIKey: "YOUR_API_KEY", Backend: genai.BackendGeminiAPI, }) if err != nil { log.Fatal(err) } result, err := client.Models.GenerateContent( ctx, "gemini-2.5-flash", genai.Text("Explain how AI works in a few words"), nil, ) if err != nil { log.Fatal(err) } fmt.Println(result.Text()) }
Java
package com.example; import com.google.genai.Client; import com.google.genai.types.GenerateContentResponse; public class GenerateTextFromTextInput { public static void main(String[] args) { // The client gets the API key from the environment variable `GOOGLE_API_KEY`. Client client = new Client(); GenerateContentResponse response = client.models.generateContent( "gemini-2.5-flash", "Explain how AI works in a few words", null); System.out.println(response.text()); } }
Apps Script
// See https://developers.google.com/apps-script/guides/properties // for instructions on how to set the API key. const apiKey = PropertiesService.getScriptProperties().getProperty('GEMINI_API_KEY'); function main() { const payload = { contents: [ { parts: [ { text: 'Explain how AI works in a few words' }, ], }, ], }; const url = `https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=${apiKey}`; const options = { method: 'POST', contentType: 'application/json', payload: JSON.stringify(payload) }; const response = UrlFetchApp.fetch(url, options); const data = JSON.parse(response); const content = data['candidates'][0]['content']['parts'][0]['text']; console.log(content); }
REST
curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=$YOUR_API_KEY" \ -H 'Content-Type: application/json' \ -X POST \ -d '{ "contents": [ { "parts": [ { "text": "Explain how AI works in a few words" } ] } ] }'
許多程式碼範例預設為啟用「Thinking」
本網站上的許多程式碼範例都使用 Gemini 2.5 Flash 模型,這個模型預設啟用「思考」功能,可提升回覆品質。請注意,這可能會增加回應時間和符記用量。如果您重視速度或希望降低成本,可以將思考預算設為零來停用這項功能,如以下範例所示。詳情請參閱思考指南。
Python
from google import genai from google.genai import types client = genai.Client(api_key="GEMINI_API_KEY") response = client.models.generate_content( model="gemini-2.5-flash", contents="Explain how AI works in a few words", config=types.GenerateContentConfig( thinking_config=types.ThinkingConfig(thinking_budget=0) # Disables thinking ), ) print(response.text)
JavaScript
import { GoogleGenAI } from "@google/genai"; const ai = new GoogleGenAI({ apiKey: "GEMINI_API_KEY" }); async function main() { const response = await ai.models.generateContent({ model: "gemini-2.5-flash", contents: "Explain how AI works in a few words", config: { thinkingConfig: { thinkingBudget: 0, // Disables thinking }, } }); console.log(response.text); } await main();
Go
package main import ( "context" "fmt" "os" "google.golang.org/genai" ) func main() { ctx := context.Background() client, _ := genai.NewClient(ctx, &genai.ClientConfig{ APIKey: os.Getenv("GEMINI_API_KEY"), Backend: genai.BackendGeminiAPI, }) result, _ := client.Models.GenerateContent( ctx, "gemini-2.5-flash", genai.Text("Explain how AI works in a few words"), &genai.GenerateContentConfig{ ThinkingConfig: &genai.ThinkingConfig{ ThinkingBudget: int32(0), // Disables thinking }, } ) fmt.Println(result.Text()) }
REST
curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=$GEMINI_API_KEY" \ -H 'Content-Type: application/json' \ -X POST \ -d '{ "contents": [ { "parts": [ { "text": "Explain how AI works in a few words" } ] } ] "generationConfig": { "thinkingConfig": { "thinkingBudget": 0 } } }'
Apps Script
// See https://developers.google.com/apps-script/guides/properties // for instructions on how to set the API key. const apiKey = PropertiesService.getScriptProperties().getProperty('GEMINI_API_KEY'); function main() { const payload = { contents: [ { parts: [ { text: 'Explain how AI works in a few words' }, ], }, ], }; const url = `https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=${apiKey}`; const options = { method: 'POST', contentType: 'application/json', payload: JSON.stringify(payload) }; const response = UrlFetchApp.fetch(url, options); const data = JSON.parse(response); const content = data['candidates'][0]['content']['parts'][0]['text']; console.log(content); }
後續步驟
您已完成第一個 API 要求,建議您參閱下列指南,瞭解 Gemini 的運作方式: