Nano Banana 2.1 for 400 product images: $30 at 0.5K up to $80 at 4K

On Sume, 400 Nano Banana 2.1 images cost $30.00 at 0.5K, $40.00 at 1K, $60.00 at 2K and $80.00 at 4K. The per-image rates are $0.075, $0.10, $0.15 and $0.20. Nano Banana 2.1 replaced Nano Banana 2 on October 6, and the repo records that the 1K price card did not change: the old nano-banana-2 ids now run as 2.1 at the same $0.08 provider list, billed at $0.10.

Resolution is the only price lever on this row, so the whole budget question is how many images you need at each size. A product catalog usually needs one hero size and many small ones, which makes a mixed plan far cheaper than a single resolution.

Price by resolution

A mixed catalog plan

Suppose 400 SKUs. Generate all 400 at 0.5K as thumbnails ($30.00), then regenerate the 100 best sellers at 2K for the product page ($15.00) and 20 campaign heroes at 4K ($4.00). The total is $49.00, which is $31.00 less than rendering every SKU at 4K.

The arithmetic: 400 x $0.075 = $30.00; 100 x $0.15 = $15.00; 20 x $0.20 = $4.00. Add the three and then, if you want the all-in figure, multiply by 1.055 for the platform fee from Sume's pricing policy: $51.70.

Steps

• Send resolution: "0.5K" for the first pass; it is the cheapest tier and enough to judge composition.
• Rerun only the keepers with resolution: "2K" or "4K".
• Do not expect the same pixels twice: each render is a fresh generation, so budget reruns as new images.
• Read usage.cost on the job to confirm the unit rate you were billed.

Quick check against the other image rows

At 1K, Nano Banana 2.1 at $0.10 sits between Imagen 4 Fast ($0.025) and Nano Banana Pro ($0.1875). A 0.5K render at $0.075 is three times the Imagen 4 Fast rate. For a plain draft where the look does not matter, the cheaper rows win on price alone; pick Nano Banana 2.1 when you have tested that its output suits your brief.

Totals scale linearly. 1,000 images at 1K is 1,000 x $0.10 = $100.00; at 2K it is $150.00. With the 5.5% fee those become $105.50 and $158.25.

A mixed batch

Not every image needs the same size. A mixed set of 100 images at each of the four sizes costs 100 x ($0.075 + $0.10 + $0.15 + $0.20) = 100 x $0.525 = $52.50, or $55.39 with the 5.5% fee. That sits between the all-1K total of $40.00 and the all-2K total of $60.00, so a split by use (thumbnails small, hero images large) lands where you would expect.

What Sume does not do

Sume does not upscale a 0.5K Nano Banana render into a 4K one for the difference; a higher tier is a new generation. Nano Banana Pro is a separate row at $0.1875 per image at its default resolution. Prices read from the repo on 2026-10-08.