Usage of gpt-image-1 is priced per token, with separate pricing for text and image tokens:
Text input tokens (prompt text): $5 per 1M tokens
Image input tokens (input images): $10 per 1M tokens
Image output tokens (generated images): $40 per 1M tokens
In practice, this translates to roughly $0.02, $0.07, and $0.19 per generated image for low, medium, and high-quality square images, respectively.
that's a bit pricy for a startup.