For small businesses, APIModels is worth a look. It's pay-as-you-go with no subscription and no verification process to get started, so you can be up and running in minutes. It covers most of the mainstream models, and you can call all of them through a single API — no need to manage separate keys or SDKs. I've been using their https://apimodels.app/stunning photo generator to handle image assets, and it's been solid for the price.