Nano Banana Pro API Pricing: How Much Does It Cost?

Nano Banana Pro is one of hiapi's priciest image models per call, and because it's billed per image rather than through a flat subscription, the actual cost of a project depends entirely on how many images you generate, at what resolution, and when you run them. This guide breaks down exactly how that billing works, what the model costs right now, and how to keep a Nano Banana Pro budget under control at scale.

Prices on any AI API change without much notice. The numbers below were checked in October 2026 — always cross-check hiapi's live pricing page before estimating a large batch job, since this page can lag a same-day price change.

How HiAPI Bills for Nano Banana Pro

HiAPI has no subscription tiers for Nano Banana Pro or any other model. Billing is strictly pay-per-call:

• You submit a generation request, HiAPI runs it, and you're charged only when the task finishes with real output.
• Failed generations aren't billed. If a task errors out, you don't pay for it.
• There's no minimum monthly spend and no seat-based pricing — a single image for a side project costs the same per-unit rate as image #100,000 in a production pipeline.
• New accounts start with 200 free credits, enough to test Nano Banana Pro's output quality before committing real spend.
• Image, video, and audio generation all run through the same asynchronous task API (submit, then poll for the result), rather than a model-specific billing path.

This is different from calling a model provider directly, where you'd typically manage a separate account, a separate rate limit, and a separate invoice per model. HiAPI pools every model behind one API key and one bill, which mostly matters for teams mixing several image or video models in the same product.

Current Nano Banana Pro Pricing (Checked in October 2026)

Two things worth noting about this table:

1. 1K and 2K cost the same. There's no price penalty for requesting the higher of the two, so there's rarely a reason to generate at 1K on purpose.
2. $0.057 (1K/2K) and $0.10 (4K) are regular rates. The current Programmers' Day · Limited-Time 50% Off Image Creation promotion covers Nano Banana 2, Nano Banana Pro, and GPT Image 2.5 Flare/Sunburst. The discount applies automatically to all users in both the API and Playground, with no code needed. Nano Banana Pro costs $0.0285 at 1K/2K and $0.05 at 4K during the promotion.

If you haven't already seen what Nano Banana Pro actually produces — 4K output, text rendering, commercial licensing — the Nano Banana Pro API guide covers that ground in more depth; this page stays focused on cost.

Estimating Cost at Scale

Because pricing is linear per image, scaling the numbers above is straightforward:

• 1,000 images at 2K: roughly $57 at regular pricing.
• 1,000 images at 4K: roughly $100 at regular pricing. During the 50%-off promotion, the 2K and 4K batches cost $28.50 and $50 respectively.
• A mixed batch: multiply each resolution tier's image count by its per-image rate and sum.

A few things that change the real-world total:

• Retries aren't free in practice. A prompt that needs three attempts to get right costs three times the per-image rate, even though failed tasks aren't billed — a successful-but-unwanted image still counts as a successful generation.
• Resolution choice compounds fast. Defaulting an entire pipeline to 4K when most outputs only need 2K can roughly double your spend for no visual benefit on smaller display sizes.
• Promotional windows are temporary. If you're planning a large batch job, running it inside an active discount window (like the one above) rather than after it closes is a meaningful cost lever — just confirm the promotion is still live via /en/promotions before you kick off the run.

Tips to Control Nano Banana Pro Costs

• Default to 2K, not 1K. Since both cost the same, there's no savings from requesting the lower resolution — you're just leaving quality on the table.
• Reserve 4K for final deliverables. Use 2K for drafts, iteration, and internal review, and only generate at 4K once a prompt is locked in.
• Prototype on a cheaper tier first. If a shot doesn't need Nano Banana Pro's strongest text rendering or 4K ceiling, testing the prompt on the standard Nano Banana or Nano Banana 2 tier first (standard Nano Banana costs less; Nano Banana 2 costs less at 1K/4K and matches Pro at 2K) can validate the concept before you spend at Pro rates.
• Watch for failed-task billing errors in your own code. Since failed tasks aren't charged, a retry loop that doesn't correctly detect task failure can end up re-submitting (and paying for) images it thinks failed but actually succeeded.
• Re-check pricing before firing a large batch. A quick call to /api/pricing before a bulk run costs nothing and confirms you're budgeting against the current rate, not a cached number from a prior project.

FAQ

Does hiapi charge a subscription fee to use Nano Banana Pro? No. There's no subscription or monthly minimum — you're billed per successful image generation, and unused free credits from signup never expire into a charge.

Which rates are regular, and when does the 50%-off promotion end? $0.057 (1K/2K) and $0.10 (4K) are regular rates. The Programmers' Day promotion reduces them to $0.0285 and $0.05 respectively until November 9, 2026 00:00 UTC+8. Check /en/pricing for the live rate.

Why does 1K cost the same as 2K? That's simply how hiapi's resolution tiers for this model are priced — the jump only happens going from 2K to 4K. Practically, that means you should request 2K by default unless file size specifically matters.

How does Nano Banana Pro's price compare to Nano Banana or Nano Banana 2? At regular rates, Nano Banana Pro costs more than standard Nano Banana. Compared with Nano Banana 2, Pro costs more at 1K and 4K and the same at 2K ($0.057). For the full side-by-side on capability (not just price), see the Nano Banana Pro API guide.

Do failed generations count against my bill? No — HiAPI only charges for tasks that complete with real output. A task that errors or times out isn't billed.

Takeaways

• Nano Banana Pro is billed per image through hiapi's task API: $0.057 for 1K or 2K, $0.10 for 4K at regular rates, checked in October 2026.
• The Programmers' Day promotion halves those regular rates to $0.0285 (1K/2K) and $0.05 (4K) — confirm the live rate on /en/pricing before budgeting a large run.
• Since 1K and 2K cost the same, defaulting to 2K and reserving 4K for final assets is the simplest way to avoid overpaying.

Ready to try it? Get a free HiAPI key and test Nano Banana Pro with your own prompts before committing to a production budget.