Token Spend by Workload (Vega-Lite)

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "title": "Monthly inference spend by workload (USD thousand)",
  "data": {
    "values": [
      {"month": "Jan", "workload": "Interactive chat", "spend": 41}, {"month": "Jan", "workload": "Batch summarisation", "spend": 18}, {"month": "Jan", "workload": "Embeddings", "spend": 9}, {"month": "Jan", "workload": "Evaluation runs", "spend": 4},
      {"month": "Feb", "workload": "Interactive chat", "spend": 46}, {"month": "Feb", "workload": "Batch summarisation", "spend": 24}, {"month": "Feb", "workload": "Embeddings", "spend": 11}, {"month": "Feb", "workload": "Evaluation runs", "spend": 5},
      {"month": "Mar", "workload": "Interactive chat", "spend": 52}, {"month": "Mar", "workload": "Batch summarisation", "spend": 37}, {"month": "Mar", "workload": "Embeddings", "spend": 12}, {"month": "Mar", "workload": "Evaluation runs", "spend": 7},
      {"month": "Apr", "workload": "Interactive chat", "spend": 55}, {"month": "Apr", "workload": "Batch summarisation", "spend": 61}, {"month": "Apr", "workload": "Embeddings", "spend": 13}, {"month": "Apr", "workload": "Evaluation runs", "spend": 9},
      {"month": "May", "workload": "Interactive chat", "spend": 58}, {"month": "May", "workload": "Batch summarisation", "spend": 74}, {"month": "May", "workload": "Embeddings", "spend": 14}, {"month": "May", "workload": "Evaluation runs", "spend": 8},
      {"month": "Jun", "workload": "Interactive chat", "spend": 61}, {"month": "Jun", "workload": "Batch summarisation", "spend": 82}, {"month": "Jun", "workload": "Embeddings", "spend": 15}, {"month": "Jun", "workload": "Evaluation runs", "spend": 11}
    ]
  },
  "mark": "bar",
  "encoding": {
    "x": {"field": "month", "type": "ordinal", "sort": ["Jan", "Feb", "Mar", "Apr", "May", "Jun"], "title": null},
    "y": {"field": "spend", "type": "quantitative", "stack": "zero", "title": "USD thousand"},
    "color": {"field": "workload", "type": "nominal", "title": "Workload"}
  }
}