jide/nano-banana-2-transparent

Nano Banana 2 with alpha transparency. Generates images with real RGBA transparency using triangulation matting — clean edges, proper semi-transparency, and accurate colors. Powered by Google Gemini 3.1 Flash Image.

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Run time and cost

This model runs on CPU hardware. We don't yet have enough runs of this model to provide performance information.

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Nano Banana 2 Transparent

Generate images with real alpha transparency using Nano Banana 2 (Google Gemini 3.1 Flash Image).

Unlike background removal tools that process after the fact, this model uses triangulation matting — generating the same subject on white and black backgrounds, then computing mathematically accurate per-pixel alpha values. This produces clean edges, proper semi-transparency, and correct color recovery that background removers can’t match.

How it works

  1. Your prompt is sent to Nano Banana 2 with a white background
  2. The white result is edited to a black background (constrained edit, preserving the foreground exactly)
  3. A triangulation matte computes the true alpha channel from the white/black pair:
  4. alpha = 1 - (white_pixel - black_pixel) / 255
  5. Foreground color is recovered via weighted unpremultiply
  6. Output is a PNG with proper RGBA transparency

Parameters

All Nano Banana 2 parameters are supported:

Parameter Description
prompt Text description of the image to generate
image_input Optional input image for editing (result will have transparency)
aspect_ratio 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9, 1:4, 4:1, 1:8, 8:1, match_input_image
resolution 512px, 1K, 2K, 4K
google_search Ground generation in real-time web data
image_search Use Google Image Search for visual context
replicate_api_token Your Replicate API token (required — the model calls Nano Banana 2 internally)

Output

Always returns a PNG with alpha channel (RGBA). The output format is always PNG regardless of settings, since transparency requires it.

Use cases

  • Game assets and sprites with clean edges
  • UI elements and icons with proper transparency
  • Product photos on transparent backgrounds
  • Stickers and overlays
  • Design assets ready for compositing

Note on billing

This model calls Nano Banana 2 twice per run (white + black background). You are billed for: - This model’s CPU compute time (minimal — just pixel math) - Two Nano Banana 2 runs (the main cost)

Your replicate_api_token is handled securely and never logged.

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