Nano Banana 2.1

GoogleReasoning

google/gemini-nano-banana-2.1Closed API

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

Benchmark Pricing$1.50 / 1M in$7.50 / 1M out$0.15 cache read

Context: 131,072 tokens•Max Output: 32,768 tokens•Released: 2026-10-06

TECHNICAL SPECIFICATIONS

Context Window131,072131.1K tokens

Max Output32,76832.8K tokens

LicenseProprietaryCloud API only

Input Modalities

TextVisionVideo

Function / Tool CallingNot Supported

Structured OutputsPrompt Based

MODEL CONTEXT PROTOCOL (MCP) READINESS

⚠ Nano Banana 2.1 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 131,072 tokens, this model can handle moderately large MCP tool definitions and multi-turn conversation logs comfortably.

API CALL INVOCATION EXAMPLE

// Example: Calling Nano Banana 2.1 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-nano-banana-2.1",
  messages: [{ role: "user", content: "Hello! Can you inspect MCP tools?" }],
});

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