Nano Banana 2.1 or Pro: 10 vs 19 cents, and four ratios Pro lacks

Nano Banana 2.1 costs 10 cents per image on Sume and Nano Banana Pro costs 19 cents, both at the 1K default. Both accept edits and four resolution tiers (0.5K, 1K, 2K, 4K). The catalog difference you can check is ratios: 2.1 lists 4:1, 1:4, 8:1 and 1:8 for banners and tall strips, and Pro does not.

Side by side

Sume bills the catalog list price multiplied by 1.25 and rounded up to the next cent. The list rates are $0.08 for 2.1 and $0.15 for Pro. The catalog notes say the list is the 1K default and that charges scale for other tiers, with 4K higher on Pro, so do not multiply these figures for 4K.

Which to use

Pro costs 9 cents more per image, so 100 Pro heroes cost $9 more than the same 100 on 2.1. That is a small premium for a final, and a poor trade for drafts. A common split is to draft on 2.1 and re-render only the winners on Pro, keeping the prompt and references the same.

Note the ratio gap before you commit. A 4:1 web banner, an 8:1 strip or a 1:4 bookmark cannot be requested from Pro, and Sume will return 400 unsupported_parameter instead of picking a nearby shape. Both rows list 4:5, 9:16 and 16:9.

The old id nano-banana-2 still works and runs as Nano Banana 2.1, so existing calls land on the cheaper of the two.

• Drafts and volume: 2.1, 10 cents.
• Hero finals where you want the Pro row: 19 cents.
• Panorama or tall strips: 2.1 only.

Test plan

Run 20 prompts on both: $2.00 on 2.1 and $3.80 on Pro. Compare at the size you will publish.

Resolution and cost

Both rows list four tiers: 0.5K, 1K, 2K and 4K. The catalog prices are the 1K default, and the charge is scaled for the other tiers, so read the endpoint price before a 4K run rather than assuming a multiple. A cheap way to cut cost is 0.5K for thumbnails and drafts, then 2K only for the pieces you keep.

For a 50-product set, three ratios each, the cost is 150 images: $15 on 2.1 and $28.50 on Pro. Draft all 150 on 2.1 and re-render the 20 you will feature on Pro for $3.80, and the set costs $18.80 in total.