Nano Banana 2 Preview

GoogleReasoning

google/gemini-3.1-flash-image-previewClosed API

Image model for prompt-driven generation, editing, and visual design workflows

Benchmark Pricing$0.50 / 1M in$60.00 / 1M out

Context: 65,536 tokens•Max Output: 65,536 tokens•Knowledge: 2025-01•Released: 2026-02-26

TECHNICAL SPECIFICATIONS

Context Window65,53665.5K tokens

Max Output65,53665.5K tokens

LicenseProprietaryCloud API only

Input Modalities

TextVisionPDF

Function / Tool CallingNot Supported

Structured OutputsPrompt Based

MODEL CONTEXT PROTOCOL (MCP) READINESS

⚠ Nano Banana 2 Preview does not natively advertise tool-calling capabilities. When connecting to MCP servers, function calling must be handled via structured prompt injection.

MCP Context Window Recommendations

With a context capacity of 65,536 tokens, this model can handle compact tool sets. Consider keeping MCP server tool manifests minimal to preserve headroom.

API CALL INVOCATION EXAMPLE

// Example: Calling Nano Banana 2 Preview via OpenAI SDK
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.GOOGLE_API_KEY,
});

const response = await client.chat.completions.create({
  model: "google/gemini-3.1-flash-image-preview",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

console.log(response.choices[0].message.content);