I want to say, "Same character, but smiling", or even, "Same character, but with the facial expression of rictus.png"

There's loads of faceswap models, is there a facialexpressionswap model?

They just added a model called Gemma, which is made by Google.

Their options are now some ChatGPT versions, Gemma, Mistral (from France), and Claude....

....it seems a bit coincidental that they do not have GLM or Deepseek or Kimi or Qwen's open-weight models