[UX] Show the model context size when selecting model #63

Describe your experience
Currently, when selecting a model there is no mention of context size of the model and I keep constantly choosing big models for a medium size task that can be handled with the small model with.

Suggestions for improvement
I feel like if there was the context size mention for each model, then user's can select the better model for their task. I feel like many smalls to medium kind of task can be handled with GPT 5 mini but since i didn't know the context size, and it has mini in its name i automatically assume it cannot do complex task and i keep choosing sonnet 4 or 4.5 which is over kill. So I think these issues can be prevented.