One is Fireworks, an AI production workflow optimization platform that's highly scalable and reliable. It supports advanced image models like Stable Diffusion 3 and SDXL, and you can deploy models in a variety of ways, including serverless and dedicated servers. Fireworks has features like optimized inference and a large library of models, and it's good for large-scale use, too, with a variety of pricing tiers for different needs.
Another option is Prodia, an API that uses Stable Diffusion technology for AI image generation. Prodia is a scalable and affordable option that generates images in under 2 seconds and can handle large-scale use with more than 10,000 GPUs. It supports a range of image models, and you can get a free API key, too, so it's accessible and relatively cheap.
If you want a broader suite of generative AI models, Stability AI gives you access to powerful models across image, video and audio domains. With flexible membership options and the ability to self-host models, Stability AI is good for developers and researchers who want to experiment with generative AI and build more advanced apps.