Using Nano Banana 2 (Gemini 3.1 Flash Image Preview) on GCP Vertex AI
Implementation guide · Gemini 3.1 · Google DeepMind
GCP Vertex AI exposes Nano Banana 2 (Gemini 3.1 Flash Image Preview) through model ID gemini-3.1-flash-image-preview. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.
Last refreshed 2026-06-15. Next refresh: weekly.
Quick Start
- 1
- 2Use the GCP Vertex AI SDK or REST API to call
gemini-3.1-flash-image-preview— see the documentation for request format. - 3
Code Examples
pip install google-cloud-aiplatformGOOGLE_CLOUD_PROJECTgemini-3.1-flash-image-previewFor Google-published models use the model name directly, e.g. "gemini-2.0-flash-001". For third-party publishers (Anthropic, Meta, etc.) use the full publisher path, e.g. "publishers/anthropic/models/claude-3-5-sonnet-v2@20241022".
import os
import vertexai
from vertexai.generative_models import GenerativeModel
# Reads GOOGLE_CLOUD_PROJECT from env; authenticates via Application Default Credentials
vertexai.init(project=os.environ["GOOGLE_CLOUD_PROJECT"], location="us-central1")
model = GenerativeModel("gemini-3.1-flash-image-preview")
response = model.generate_content("Hello")
print(response.text)Pricing on GCP Vertex AI
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.50 |
| Output tokens | $60.00 |
Capabilities
No model capability flags are currently sourced.
About Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Preview release of Nano Banana 2 for Gemini 3.1 Flash Image. Google released the GA gemini-3.1-flash-image model on 2026-05-28 and will retire this preview API ID on 2026-06-25.