The Cheapest Image APIs, by Cost per Image
Image APIs are priced per image (by resolution/quality), not per token — so comparison is refreshingly simple. Here's the value ranking for 2026, cheapest first, with the quality trade-off.
| Model | ~Cost/image | Strength |
|---|---|---|
| Open models (Z-Image etc., self-host/host) | ~$0.004 | Cheapest, but you manage infra |
| Seedream 5.0 Pro | ~$0.0675–0.135 | Cheapest premium; 14-lang text, layer edits |
| Nano Banana 2 | ~$0.045–0.15 | Fast, strong quality |
| GPT Image 2 | ~$0.05 (med) – $0.35 (4K) | Reasoning layouts, near-perfect text |
| Nano Banana Pro | ~$0.134 (1K/2K) – $0.24 (4K) | ~94% text, grounding, 4K |
Cheapest ≠ Best Value
The absolute cheapest is a self-hosted open model — but only if you own GPUs and keep them busy (serverless GPU vs generation API). For hosted APIs, Seedream 5.0 Pro is the value leader: premium quality and multilingual text at the lowest premium price. If you need maximum text legibility or 4K, Nano Banana Pro justifies its premium.
How to Actually Cut the Bill
- Right-size resolution — generate at 1K/2K for web, reserve 4K for hero assets (4K can cost 3–5x).
- Draft cheap, finalize premium — iterate concepts on a lite/cheaper model, render finals on Pro.
- Batch where supported.
- Pick per job — text-heavy → Seedream/Nano Banana Pro; simple assets → cheaper tiers.
Through LinkModel, every model above is on one key up to 30% below official, with the exact price shown before each call — so you can A/B on cost and quality in one line:
curl -X POST https://api.linkmodel.ai/api/v1/image-generation \
-H "Authorization: Bearer $LINKMODEL_API_KEY" -H "Content-Type: application/json" \
-d '{ "model": "seedream-5.0-pro", "prompt": "Ecommerce product on white, soft shadow, 2K" }'Confirm the endpoint in the docs.
Which to Pick
- Best value overall → Seedream 5.0 Pro.
- Cheapest fast quality → Nano Banana 2.
- Text/4K priority → Nano Banana Pro or GPT Image 2.
- Rock-bottom + own GPUs → open models (Z-Image).
Full field in best AI image generation APIs; premium head-to-head in Seedream vs Nano Banana Pro. Also see cheapest AI API overall.
Bottom Line
For hosted image generation, Seedream 5.0 Pro is the cheapest premium option; drop to Nano Banana 2 for speed or open models for rock-bottom cost. Right-size resolution and draft-then-finalize to keep the bill low.
Start free with a $1 credit and compare cost per image.