A few hours ago Stability AI made Stable Diffusion 3 and Stable Diffusion 3 Turbo available via their API. You still can't download and run it locally, BUT I was able to code up a UI for it that you can access if you are a subscriber over at https://pixeldojo.ai . It's pretty expensive to run compared to the older models, but I couldn't pass up adding it to the site for people to play around with.
Here is the announcement from Stability: https://stability.ai/news/stable-diffusion-3-api
Key Takeaways
Stable Diffusion 3 and Stable Diffusion 3 Turbo are now available on the Stability AI Developer Platform API.
We have partnered with Fireworks AI, the fastest and most reliable API platform in the market, to deliver Stable Diffusion 3 and Stable Diffusion 3 Turbo.
In keeping with our commitment to open generative AI, we aim to make the model weights available for self-hosting with a Stability AI Membership in the near future.