Errors and fixes
Image API returned no image? Declined requests explained
Why a model sometimes returns no image, what it looks like in the API response, and how to reword a harmless prompt that was misread.
#Blog category
Errors and fixes
What an API response means and what to do next: limits, requests declined under the content rules, retries without a double charge.
More on the blog
All blog articles
Working with the API
Batch image generation API: queue, webhooks, safe retries
How to send many requests and keep track of every one: a queue on your side, webhooks, and the X-Idempotency-Key header for safe retries.
Model comparisons
The best image generation APIs: 10 models in one table
Nano Banana and GPT Image side by side: resolutions, price per image, average response time and what each model is best for.
Pricing and billing
A failed request is free: how paying per image works
The amount is charged when you send a request, and if no image comes back, it goes straight back to your balance. Here’s how that looks in the API response and in the portal.