AI Image Generation APIs (Text-to-Image)
Generate images from a text prompt through one unified API. ApexApi serves the leading image models, including Flux, Imagen, and Nano Banana, behind a single key with transparent per-image pricing. Failed generations are not billed, and you can switch models by changing one slug.
29 Image models on ApexApi
Why build on ApexApi
One API, every model
OpenAI-compatible. Swap the base URL and key, keep your code. Call 14+ providers and hundreds of models through a single integration.
Smart routing & failover
Per-model provider chains with automatic failover. If one provider degrades, requests route to the next. Your app stays up.
Pay-per-use, no lock-in
Buy credits, pay only for what you call. No subscriptions, no minimums. Switch models anytime with a single string change.
Frequently asked questions
- How does the image generation API work?
- POST to /v1/images/generations with a model slug and a prompt. You get back an image URL. Same ak- key and credit balance as the rest of the catalog, billed per successful image.
- How much does image generation cost?
- Pricing is per image and varies by model. Each model page shows its live per-image price. There is no subscription; you buy credits and pay only for what you generate.
- Which image model is best?
- Different models trade off quality, style, speed, and price. Because they share one API and key, the practical approach is to run the same prompt through a few and compare the results and cost.