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Nano Banana 2's competitors have been quietly putting in work.
Gemini 3.1 Flash Image Preview, sold as Nano Banana 2. Google's image generation and editing model at Flash speed and Flash pricing, aimed at iterative edits rather than one-shot renders.
No free endpoint for Nano Banana 2 was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.
Provider data: OpenRouter usage limits
Per million tokens. Prices and uptime via OpenRouter, checked 11 Oct 2026.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="$OPENROUTER_API_KEY",
)
response = client.chat.completions.create(
model="google/gemini-3.1-flash-image",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const response = await client.chat.completions.create({
model: "google/gemini-3.1-flash-image",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"google/gemini-3.1-flash-image","messages":[{"role":"user","content":"Hello!"}]}'Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.
Also on Google Vertex AI
18 outputs · $1.21 tracked across 18 receipts