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Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)

GoogleReleased Jun 30, 2026

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is Google's fastest, most cost-efficient Gemini image model, built for high-velocity developer pipelines and rapid-fire visual exploration. It delivers text-to-image generation...

Try in playground
Context window
66K tokens
Max output
66K tokens
Input
image, text
Output
image, text
Tokenizer
Gemini
Knowledge cutoff
Jan 1, 2025
Released
Jun 30, 2026
Reasoning
optional

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Per 1M tokensProvider+ 3% feeYou pay
Input$0.250$0.0075$0.258
Output$1.50$0.045$1.54

Supported parameters

  • include_reasoning
  • max_tokens
  • reasoning
  • response_format
  • seed
  • temperature
  • top_p

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model google/gemini-3.1-flash-lite-image.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3.1-flash-lite-image",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="google/gemini-3.1-flash-lite-image",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_API_KEY,
});

const completion = await client.chat.completions.create({
  model: "google/gemini-3.1-flash-lite-image",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) cost via API?
Through OpenKey, Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) costs $0.258 per 1M input tokens and $1.54 per 1M output tokens. That is the provider price ($0.250 / $1.50) plus a flat 3% fee — nothing else.
What is Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)'s context window?
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) accepts up to 66K tokens of context and returns up to 66K tokens per request.
Is Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "google/gemini-3.1-flash-lite-image" using any OpenAI SDK — only the base URL and API key change.
What inputs does Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) support?
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) accepts image, text input and produces image, text output. Its knowledge cutoff is Jan 1, 2025.

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