AI Image Generators Compared: Midjourney, DALL-E and Stable Diffusion
Midjourney, ChatGPT image generation and Stable Diffusion compared on access, pricing models and control, from official vendor documentation.
By Galactic News Editorial · Published 2026-11-06T22:46:51+00:00 · Updated 2026-11-06T22:46:51+00:00
These three AI image generators work in completely different ways. Midjourney is a subscription service with metered GPU time. OpenAI's image tool lives inside ChatGPT, priced by chat plan. Stable Diffusion is downloadable software, plus a pay-per-image API. The right choice depends on how you work, not on a single quality score. This comparison is research-based. Prices and limits come from official vendor pages, checked on 7 November 2026.
AI image generators compared at a glance
| Generator | Free option | Paid entry | Standout feature |
|---|---|---|---|
| Midjourney | No free plan on web or Discord | Basic, $10 per month | Relax Mode with unlimited images on Standard and up |
| ChatGPT image generation (OpenAI) | Yes, limited image creation on the free plan | Go, $8 per month; Plus, $20 per month | Create and edit images inside a chat conversation |
| Stable Diffusion (Stability AI) | Self-host the open weights; API is pay per image | API from $0.025 per image (SD 3.5 Flash) | Run it yourself, or call the API with editing and control tools |
The pricing models shape everything else. Midjourney sells time on its GPUs. ChatGPT sells a bundle where images share limits with chat. Stable Diffusion sells nothing if you run it locally. Its API instead charges a few cents per picture.
Midjourney: the subscription studio
Midjourney sells four subscription tiers. Its official plan comparison lists them clearly. Basic costs $10 per month. Standard costs $30 per month. Pro costs $60 per month. Mega costs $120 per month. Annual billing takes 20 percent off each price. The full year is paid upfront.
What changes is GPU time. Basic includes 3.3 hours of Fast GPU time per month. That is 200 minutes. Standard includes 15 hours. Pro includes 30 hours. Mega includes 60 hours. Extra Fast time costs $4 per hour on every plan.
Relax Mode is the dividing line. It generates images without spending Fast hours. Basic has no Relax Mode. Standard adds unlimited Relax images. Pro and Mega add unlimited Relax SD video as well. Stealth Mode, which keeps your work private, starts at Pro. All plans carry general commercial terms. One catch matters for big companies. Firms earning over $1,000,000 a year must use Pro or Mega.
There is no free plan. Midjourney's help center states that no free trial runs on its website or in Discord. A limited trial exists only in the separate niji journey mobile app. You create through the Midjourney website or Discord. Queue limits also scale by plan. Basic runs three Fast image jobs at once. Pro and Mega run up to twelve. Rating images can earn back small amounts of free GPU time. The experience suits creators who generate often. Metered Fast time rewards a deliberate workflow. Batch your experiments in Relax Mode, then spend Fast hours only on final renders.
OpenAI image generation inside ChatGPT
OpenAI folded its image generation into ChatGPT. The old DALL-E name has faded from the pricing page. Today you describe an image in a chat. You then refine it with follow-up messages. Edits happen in the same conversation.
Access follows your ChatGPT plan. OpenAI's pricing page gives the free plan limited image creation. The Go plan, at $8 per month, adds more image creation. Plus, at $20 per month, promises more complex and accurate image creation. The Pro tiers describe image creation as unlimited and faster. OpenAI adds that unlimited use is subject to abuse guardrails. It publishes no fixed daily image count for any plan.
This bundle logic cuts both ways. A Plus subscription also buys advanced chat, research, and coding tools. Images are one feature among many. But heavy image users share one allowance with everything else. There is no image-only plan. Developers can instead use OpenAI's API. API billing is separate from ChatGPT subscriptions. OpenAI states that plainly in its help center. Its pricing FAQ adds one more detail. Paid plans are priced per user per month. Teams on Business or Enterprise can also buy credits for more access. None of that changes the free tier. It remains the easiest free starting point of the three.
Choose this route if you already live in ChatGPT. It is the simplest of the three to start. You need no new account and no new mental model. You just ask for a picture mid-conversation. One caveat sits on the pricing page. OpenAI notes that the Go plan may include ads. Image limits are also described only in words, never numbers. If your work depends on a fixed daily volume, that vagueness is a real cost.
Stable Diffusion: open weights and an API
Stable Diffusion is Stability AI's model family. It reaches you in two ways. You can download the weights and run them yourself. Or you can call Stability's hosted API. The current flagship line is Stable Diffusion 3.5. It ships in Large, Large Turbo, Medium, and Flash variants.
Self-hosting changes the cost equation. Stability's Community License covers individuals and organizations below $1 million in annual revenue. Qualifying users pay no license fee for the core models. You still pay for your own hardware and time. In return, you get control. You can fine-tune models and run them offline.
The API is simpler, and its prices are public. Stability charges in credits. One credit equals $0.01. An SD 3.5 Flash image costs 2.5 credits, or $0.025. Medium costs 3.5 credits per image. Large Turbo costs 4 credits. Large costs 6.5 credits, or $0.065. Stable Image Core costs 3 credits. Stable Image Ultra costs 8 credits.
The API also sells editing as separate services. Inpainting, object erasing, and background removal cost 5 credits each. Structure, sketch, and style controls cost 5 to 8 credits. Upscaling is priced the same way. A fast 4x upscale costs 2 credits. A conservative 4K upscale costs 40 credits. The creative upscaler, which reinterprets detail, costs 60 credits. That menu suits developers building image features into products. It suits creators less, since there is no friendly studio interface from Stability itself. Third-party apps fill that gap.
How to choose among these ai image generators
- You generate images daily for creative work. Midjourney Standard is the natural home. Unlimited Relax images remove the meter anxiety.
- You want images as part of general AI help. ChatGPT Plus folds creation into a subscription you may already pay for.
- You need volume, privacy, or product integration. Stable Diffusion wins on control. Self-host it, or pay cents per image through the API.
- Your budget is zero. Start with ChatGPT's free tier. Or run Stable Diffusion locally if your hardware allows.
Also weigh your tolerance for setup. Midjourney and ChatGPT work the moment you subscribe. Stable Diffusion rewards technical users. Its ceiling is higher, and so is its learning curve.
Bottom line
Midjourney is the dedicated creator's subscription. It has no free tier, but its Relax Mode is generous once you pay. ChatGPT is the convenience pick, bundling images into a broader assistant. Stable Diffusion is the control pick. It is the only option here you can own outright and run on your own machine. Confirm current prices on each vendor's page before you commit.