Gemini 3.1 Flash Image (Nano Banana 2)

Save 70%

google/gemini-3.1-flash-image

Also callable as nano-banana-2

Gemini 3.1 Flash Image (Nano Banana 2) — retired. Google has released the upgraded Nano Banana 2.1; use 2.1 instead.

This model has been retired. Its provider no longer serves it, so it can no longer be called — this page is kept for reference. Pick another model.

Context window: 128K
Max output: 32K
Input modalities: text · image · video
Output modalities: text · image
Capabilities: Vision · Image generation · Image editing · Video input
RouteMux name: google/gemini-3.1-flash-image

Gemini 3.1 Flash Image (Nano Banana 2) API pricing

Prices verified 2026-06-08

InputOfficial $0.5 / M tokens

$0.15/ M tokensSave 70%

OutputOfficial $3 / M tokens

$0.9/ M tokensSave 70%

Estimate cost

Input tokensOutput tokens

Estimated cost$0.0024

Limited time10% extra Credits on your first top-up — up to 200 bonus Credits

Applies to your first top-up within 72 hours of signing up. Minimum $20, once per account.

Key capabilities

VisionImage generationImage editingVideo input

Interface and protocols

Google Vertex AI

Use any of these IDs to call this model via the API.

RouteMux namegoogle/gemini-3.1-flash-image

Common namenano-banana-2

Replace the ROUTEMUX_KEY placeholder with your API key. Create one →

from google import genai

# RouteMux 兼容 Vertex AI Gemini generateContent 接口
client = genai.Client(
    api_key="<ROUTEMUX_KEY>",
    http_options={"base_url": "https://api.routemux.com/vertex-ai"},
)

response = client.models.generate_content(
    model="google/gemini-3.1-flash-image",
    contents="What is the meaning of life?",
)
print(response.text)

base_url: https://api.routemux.com/vertex-ai

Performance (last 30 days)

0 requests · last 30 days

Total usage3.36M

P50 first-token latencyInsufficient data (0 requests)

Avg throughputInsufficient data (0 requests)

Success rate—

Uptime · 24h

—

Success rate · 60d · from real requests

Gemini 3.1 Flash Image (Nano Banana 2) FAQ

›What is Gemini 3.1 Flash Image (Nano Banana 2)?

Gemini 3.1 Flash Image (Nano Banana 2) — retired. Google has released the upgraded Nano Banana 2.1; use 2.1 instead.

›How large is the context window of Gemini 3.1 Flash Image (Nano Banana 2)?

Gemini 3.1 Flash Image (Nano Banana 2) supports a context window of up to 128K tokens, with up to 32K output tokens per request.

›How much does the Gemini 3.1 Flash Image (Nano Banana 2) API cost?

Through RouteMux, Gemini 3.1 Flash Image (Nano Banana 2) is priced at $18, below the official list price.

›Which input and output modalities does Gemini 3.1 Flash Image (Nano Banana 2) support?

Gemini 3.1 Flash Image (Nano Banana 2) accepts text, image, video as input and produces text, image as output.

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