Gemini image prices per million tokens: Pro $120, NB2 $60, Lite $30
Gemini image output costs $120 per 1M tokens on Pro, $60 on Nano Banana 2 and $30 on Lite. Divide by 1M to price one image; Sume bills a flat per-image rate.
Google prices image output at $120 per million tokens for Nano Banana Pro, $60 for Nano Banana 2 and $30 for Nano Banana 2 Lite, so Lite costs half of NB2 per output token. To get a per-image dollar figure, multiply tokens per image by the price per token. Sume skips this: it bills a flat per-image rate, and Lite is not in its catalog.
The per-million rates
Rates are from Google's pricing page. Batch and Flex are 50 percent off, and Lite's batch rate is $0.125 input and $15 output.
| Model | Input | Image output |
|---|---|---|
| Nano Banana Pro (Gemini 3 Pro Image) | $2.00 | $120 |
| Nano Banana 2 (Gemini 3.1 Flash Image) | $0.50 | $60 |
| Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) | $0.25 | $30 |
From per-million to per-image
Google also lists NB2 per-image prices of $0.045 for a 0.5K image and $0.151 for a 4K image. Dividing by the output rate gives the implied token counts: $0.045 / ($60 / 1,000,000) = 750 tokens, and $0.151 / ($60 / 1,000,000) is about 2,517 tokens. These counts are writer-derived arithmetic, not a Google statement.
What Sume bills
On Sume, usage tokens are always 0 and usage.cost is the billed USD amount. The repo's static list rates are $0.08 for google/nano-banana-2 and $0.15 for google/nano-banana-pro; billed price is list x 1.25, so $0.10 and $0.1875 (about $0.19 if rounded to cents). Quote the live pricing array in /endpoints.
| Sume model id | List | x 1.25 |
|---|---|---|
| google/nano-banana-2 | $0.08 | $0.10 |
| google/nano-banana-pro | $0.15 | $0.1875 (about $0.19) |
Sources
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Written by Sume