There are tons of commercial uses for these models. I've been experimenting with an app targeted toward language learners [1]. We use large language models to:

- Generate vocabulary - e.g. for biking: handlebars, pedals, shifters, etc

- Generate translation exercises for given topic a learner wants to learn about - e.g. I raised the seat on my bike

- Generate questions for the user - e.g. What are the different types of biking?

- Provide more fluent ways to say things - I went on my bike to the store -> I rode my bike to the store

- Provide explanations of the difference in meaning between two words

And we have fine tuned smaller models to do other thing like grammar correction, exercise grading, and embedded search.

These models are going to completely change the field of education in my opinion.

1) https://squidgies.app - be kind it's still a bit alpha