AI Image Generator Cost-Per-Image Comparator: Midjourney vs DALL-E vs Stable Diffusion

Compare the real cost per image and monthly totals for Midjourney, GPT Image (DALL-E), and Stable Diffusion based on your monthly image generation volume.

Mathematical Audit

AI Image Generation Cost-Per-Image Formula

Midjourney bills a flat monthly subscription regardless of volume, so its effective cost per image falls as you generate more. GPT Image (DALL-E) and Stable Diffusion API providers bill per image generated, so their monthly total scales linearly with volume.

Midjourney Cost per Image = Monthly Subscription Price / Images Generated
GPT Image (DALL-E) Monthly Cost = Images Generated × Per-Image Rate (by quality tier)
Stable Diffusion Monthly Cost = Images Generated × Per-Image API Rate (by tier)
Cheapest Option = the lowest of the three Monthly Cost values

Midjourney's 'Fast' generation hours are capped per plan; heavy users who exceed their fast-hours allotment fall back to slower 'Relax' mode. Stable Diffusion rates vary widely by model (FLUX Schnell vs SD 3.5 Large) and API provider.

Operational Guide

How to Use the AI Image Generator Cost Comparator

1

Enter your monthly image volume

How many final images do you need to generate per month?

2

Select your Midjourney plan

Choose Basic ($10/mo), Standard ($30/mo), or Pro ($60/mo) to see its effective per-image cost at your volume.

3

Select GPT Image (DALL-E) quality

Choose Standard ($0.04/image) or HD ($0.08/image) quality for the API-based comparison.

4

Select your Stable Diffusion tier

Choose Economy (FLUX Schnell-class models, ~$0.003/image) or Standard (SD 3.5 Large-class, ~$0.035/image).

5

Click Calculate

Compare monthly totals and cost-per-image across all three options to find the cheapest fit for your volume.

Real-World Scenario Example

"A content creator generates 600 images per month and compares Midjourney Standard, GPT Image Standard, and Stable Diffusion Economy."

Inputs

imagesPerMonth:600
midjourneyPlan:standard
dalleQuality:standard
stableDiffusionTier:economy

Result

Stable Diffusion (Economy) costs about $1.80/month ($0.003/image) — far cheaper than $24 for GPT Image Standard or $30 for Midjourney Standard ($0.05/image at this volume).

Important Disclaimer

AI image generation pricing changes frequently and varies by model version, resolution, and provider. Verify current rates on each provider's official pricing page before making purchasing decisions. These estimates are for educational comparison only.

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