DALL-E vs Midjourney vs Stable Diffusion Cost Comparison

Compare AI image generation costs at scale

Generating images at volume forces a real decision: pay per image on DALL-E 3 or Replicate, pay a flat Midjourney subscription, or rent a GPU and self-host Stable Diffusion. Each has a completely different cost curve. This tool plots all four against your monthly volume so you can see which is cheapest at your scale — and exactly where self-hosting starts to win.

How it works

API providers charge a fixed price per image, so cost scales linearly:

monthly_cost = images_per_month × price_per_image

Midjourney is a flat subscription, so its effective per-image cost falls as you generate more. Self-hosted Stable Diffusion is the opposite of an API: a fixed monthly GPU rental plus a tiny marginal cost per image. The break-even point is where the self-hosting line drops below the cheapest pay-per-image line:

break_even_images ≈ gpu_monthly_cost / cheapest_api_price_per_image

Tips for choosing a provider

• Low volume → API. Below a few thousand images a month, pay-per-image avoids idle GPU costs and operational overhead entirely.
• High volume → self-host. Past the break-even, a rented or owned GPU makes each extra image almost free.
• Quality is not just price. Midjourney’s aesthetic, DALL-E’s prompt adherence and SD’s controllability differ — weigh fit, not only cost.
• Mind the hidden costs of self-hosting. Cold starts, model loading, monitoring and engineering time are real; the GPU bill is only part of it.