Gemini 2.5 Flash Image sunset Oct 2: what 1,000 replacements cost
Google marks Gemini 2.5 Flash Image ($0.039) deprecated, sunset October 2, 2026. Nano Banana 2 is $0.067 at 1K, so 1,000 images cost $67.
Google's Gemini API pricing page lists Gemini 2.5 Flash Image at $0.039 an image and marks it deprecated with a sunset of October 2, 2026, which was yesterday. The nearest replacements cost $0.0336 (Nano Banana 2 Lite, 1K), $0.067 (Nano Banana 2, 1K) and $0.134 (Nano Banana Pro, 1K or 2K). A thousand 1K images is $33.60, $67.00 and $134.00 respectively. Read 2026-10-03.
If a pipeline still calls the old model id, check the response before blaming the prompt. The price page is the only source I read for the sunset, so confirm the date against Google's deprecation notice before you act on it.
What the page lists
The page lists Gemini 3.1 Flash Image (Nano Banana 2) at $0.045 for 512px, $0.067 for 1K, $0.101 for 2K and $0.151 for 4K, with batch at half price. Nano Banana 2 Lite is $0.0336 at 1K and $0.0168 in batch. Nano Banana Pro (Gemini 3 Pro Image) is $0.134 at 1K or 2K and $0.24 at 4K, with batch or flex at half price.
| Model | Size | Price per image | 1,000 images | 1,000 in batch (half price) |
|---|---|---|---|---|
| Nano Banana 2 (Gemini 3.1 Flash Image) | 1K | $0.067 | $67.00 | $33.50 |
| Nano Banana 2 | 2K | $0.101 | $101.00 | $50.50 |
| Nano Banana 2 | 4K | $0.151 | $151.00 | $75.50 |
| Nano Banana 2 Lite | 1K | $0.0336 | $33.60 | $16.80 |
| Nano Banana Pro | 1K / 2K | $0.134 | $134.00 | $67.00 |
| Nano Banana Pro | 4K | $0.240 | $240.00 | $120.00 |
Cheapest like-for-like swap
Versus the old $0.039, Nano Banana 2 Lite at 1K is 14 percent cheaper and Nano Banana 2 at 1K is 72 percent dearer. Those are different models with different quality, so the comparison is a price comparison, not a quality one.
Batch halves the figure to $16.80 per 1,000 for Lite, but batch is asynchronous, so it only suits work that can wait.
On Sume
Sume's Image Router lists Nano Banana 2 and Nano Banana Pro as model ids and bills list times 1.25, per its rate card. That means any price above becomes 25 percent higher when run through Sume, in exchange for one wallet and one API across providers. The per-image rates for each model are on the Sume API pricing page; check them there rather than reusing Google's numbers.
Limits
The safest migration is to run both models on ten of your own prompts and compare.
- I did not read Google's deprecation notice; the sunset date comes from the price page.
- Prices are for the standard tier and exclude any grounding or search add-ons.
- Image quality differs between these models.
Sources
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Written by Sume