xychart-beta
    title "API 输出价格对比（$/百万 tokens）"
    x-axis ["Gemini 3.1 Pro", "GPT-5.4", "Claude Opus 4.6", "GPT-5.4 Pro"]
    y-axis "价格 ($)" 0 --> 200
    bar [12, 15, 25, 180]