This is brilliant. Thank you very much for this link. The analysis on the last image was impressive and quite thorough (given the simple prompt).

Every chart has an equivalent tabular representation. One way to get "charts" analysed like this before GPT Vision was to just pass tabular representations of charts to GPT-4. This makes implementing chart analysis a lot simpler. I do wonder though if for absolute best result it still wouldn't be better to pass both - image of the chart and the tabular representation of the chart.

Imagine having a dashboard with 5 different visualisations. You could capture the state of the entire dashboard in one screenshot and then pass tabular representations of the each individual chart all in one prompt to GPT-4 for a very comprehensive analysis and summary.