Runware vs Stability AI (2026): which should you pick?
As of Nov 12, 2026, Runware grades higher than Stability AI: 2.0 against 1.8 out of 4.0.
Checked Oct 17, 2026 and Nov 12, 2026 · graded Oct 17, 2026 and Nov 12, 2026 by ToolGPA
Runware grades higher on features. Stability AI grades higher on the free plan. They get the same grade on value for money, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Stability AI
Stable Diffusion image models to self-host or call through an API
Free plan
Which one is for you
Pick Runware if
- Fits if you build apps that call many models
- Works for teams wanting GPU compute
Look elsewhere if
- Skip it if you aren't a developer
- Tight if you use a personal email, since the free credit needs a business one
- Watch out: no minimum top-up is stated
- Watch out: volume discounts need contacting sales
Pick Stability AI if
- Fits if you're a developer adding image generation and editing to your own app
- Works for teams who can run open image models on their own hardware or call them on Bedrock or Azure
Look elsewhere if
- Skip it if you just want to type a prompt and get a picture, as there's no app; Start creating leads to enterprise partnerships
- Not for you if your company makes over $1M a year, as that needs an Enterprise License priced by sales
- Too light for developers who want video by API, as the price list has none; Stable Video Diffusion is self-host only
- Watch out: the API is pay per use at a cent a credit, 2.5 to 8 credits an image and 60 for the Creative Upscaler
- Tight if you have no hardware of your own, as the free license means running the models yourself, and the API start is 25 credits
How we grade them
| 2.0GPARunwareFair | 1.8GPAStability AIWeak | |
|---|---|---|
| Value for money | CPay as you go at rates such as $0.02 an image, with no monthly plan to compare. | CNothing a person can subscribe to. The models are free to run yourself under $1M yearly revenue, which takes your own hardware, and the API charges $0.025 to $0.08 an image at a cent a credit. There's no plan to set against this category's. |
| Free plan and trial | DA $2 credit, only for sign-ups with a business email. | CThe Community License lets people and companies under $1M a year run the core models free, commercial use included. That needs your own hardware, and the API's free start is 25 credits. |
| Features | BOne endpoint for many models, serverless and reserved GPUs, custom models and LoRA training. | DBuilding blocks only: SD 3.5 models, editing, upscaling, sketch and style control, and 3D. There's no app for a person, and the image page's Start creating link goes to enterprise partnerships, so it needs code or another product to be useful. |
| Ease of use | DAn API, so you need code, though there is a playground. | DNo app and no rating. Using it means calling an API from code or running the models on your own hardware. |
| Platforms and integrations | BA web playground plus a pay-per-use API. | BAn API plus the models on Amazon Bedrock, SageMaker JumpStart and Microsoft Azure AI Foundry, and downloads for your own machines. No phone or desktop app. |
| Best for | one API for many image, video and audio models | developers building on open image models |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Runware and Stability AI. How we grade
Where they differ
- Stability AI is self-hostable, according to its own site.
In commonWebPublic APIAI featuresImage generationVideo generation
At a glance
| Runware | Stability AI | |
|---|---|---|
| Pricing | Free trial | Free plan |
| Starts at | Not published | Not published |
| Free plan | None | Community License: free self-hosted use of the core models, commercial use included, for people and organizations under $1M in yearly revenue. |
| Free trial | New users who sign up with a business email receive $2 in free credits. | 25 free API credits on sign-up |
| Web | ||
| Made by | Runware, Inc. | Stability AI Ltd |
| Price read from | runware.ai | stability.ai |
| Checked | Nov 12, 2026 | Oct 17, 2026 |
Worth knowing
Runware
- There are no monthly plans: billing is pay-as-you-go, and the pricing page does not state a minimum top-up.
- The FAQ says image generation typically costs from fractions of a cent to a few cents per image, depending on model, resolution and quality.
- Language models are billed per million input, output and cache tokens rather than per image.
- The $2 free credit goes to sign-ups with a business email, and volume discounts require contacting sales.
Stability AI
- The API is pay per use: 1 credit is $0.01, an image costs 2.5 to 8 credits, and the Creative Upscaler costs 60 credits per image.
- Organizations with more than $1M in yearly revenue need an Enterprise License, priced only through sales.
- The API price list has image, 3D and audio services but no video; Stable Video Diffusion is offered for self-hosting only.
- There is no image app sold to consumers: the image page's "Start creating" link leads to the enterprise partnerships page.
Key features
Runware
- One endpoint for many models
- The pricing page says image, video, audio, language and 3D models share one endpoint, auth and billing, and that switching models is a string change.
- Pay-as-you-go rate sheet
- Published per-generation rates for more than 300 models, with example prices at default settings.
- Serverless and reserved GPUs
- Bring your own model, code or container and pay for GPU time by the second, or reserve compute.
- Playground and tooling
- A playground estimates cost for a specific request, and the site lists an MCP server and a CLI.
- Custom models and LoRA training
- Uploaded models and content stay private and are not used for training, according to the FAQ.
Stability AI
- Stable Diffusion 3.5 models
- Large, Large Turbo and Medium versions of the image model to download and run yourself; Medium is designed to run on consumer hardware.
- Image generation API
- Stable Image Ultra, Stable Image Core, the Stable Diffusion 3.5 family and SDXL, each billed per image in credits.
- Editing API
- Erase objects, inpaint, outpaint, remove or replace a background and relight, and find an object by name to recolor or replace it.
- Upscaling and control
- Creative, Conservative and Fast upscalers, plus sketch, structure and style tools that guide a new image from one you supply.
- Video and 3D models
- Stable Video Diffusion turns text into short clips for self-hosting; Stable Fast 3D and SPAR3D make 3D assets from one image through the API.
- Cloud partners
- The models are also offered on Amazon Bedrock, Amazon SageMaker JumpStart and Microsoft Azure AI Foundry, and in NVIDIA-optimized versions.
Plans
Runware
Pay as you go$0
no subscription; billed per generation or per token
No monthly fee. Rates are listed per model on the pricing page, per image, per video clip or per million tokens.
Stability AI
Community License$0
Run Stable Diffusion 3.5, SDXL Turbo, Stable Fast 3D and Stable Audio 3.0 on your own hardware; for those under $1M in yearly revenue.
Enterprise LicenseCustom
Commercial use above $1M in yearly revenue, with implementation support; custom model training and consulting cost extra.
Common questions
Which is cheaper, Runware or Stability AI?
As of Nov 12, 2026, Runware publishes no starting price, and Stability AI publishes no starting price.
Which has a free plan, Runware or Stability AI?
As of Nov 12, 2026, only Stability AI has a free plan. Runware does not, though it has a free trial.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.