The Interactions API is our simplest and best way to build with Gemini models and agents. Learn more in the Interactions API Overview.
The fastest path from prompt to production with Gemini, Veo, Nano Banana, and more.
Python
from google import genai
client = genai.Client()
interaction = client.interactions.create(
model="gemini-3.5-flash",
input="Explain how AI works in a few words"
)
print(interaction.output_text)
JavaScript
import { GoogleGenAI } from "@google/genai";
const ai = new GoogleGenAI({});
const interaction = await ai.interactions.create({
model: "gemini-3.5-flash",
input: "Explain how AI works in a few words",
});
console.log(interaction.output_text);
REST
curl -X POST "https://generativelanguage.googleapis.com/v1beta/interactions" \
-H "x-goog-api-key: $GEMINI_API_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "gemini-3.5-flash",
"input": "Explain how AI works in a few words"
}'
Follow our Quickstart guide to get an API key and make your first API call in minutes.
Meet the models
View allGemini 3.1 Pro New
Our most intelligent model, the best in the world for multimodal understanding, all built on state-of-the-art reasoning.
Gemini 3.5 Flash New
Frontier-class performance rivaling larger models at a fraction of the cost.
Gemini 3.1 Flash-Lite New
High-volume, cost-sensitive model with the performance and quality of the Gemini 3 series.
Gemini 3 Flash
Frontier-class performance rivaling larger models at a fraction of the cost.
Nano Banana 2 and Nano Banana Pro
State-of-the-art image generation and editing models.
Veo 3.1
Our state-of-the-art video generation model, with native audio.
Gemini Robotics
A vision-language model (VLM) that brings Gemini's agentic capabilities to robotics and enables advanced reasoning in the physical world.
Explore Capabilities
Native Image Generation (Nano Banana)
Generate and edit highly contextual images natively with Gemini 2.5 Flash Image.
Long Context
Input millions of tokens to Gemini models and derive understanding from unstructured images, videos, and documents.
Structured Outputs
Constrain Gemini to respond with JSON, a structured data format suitable for automated processing.
Function Calling
Build agentic workflows by connecting Gemini to external APIs and tools.
Video Generation with Veo 3.1
Create high-quality video content from text or image prompts with our state-of-the-art model.
Voice Agents with Live API
Build real-time voice applications and agents with the Live API.
Tools
Connect Gemini to the world through built-in tools like Google Search, URL Context, Google Maps, Code Execution and Computer Use.
Document Understanding
Process up to 1000 pages of PDF files with full multimodal understanding or other text-based file types.
Thinking
Explore how thinking capabilities improve reasoning for complex tasks and agents.