xychart-beta
    title "上下文窗口演进（单位：K tokens）"
    x-axis ["GPT-5.2", "GPT-5.3 Codex", "GPT-5.4 标准", "GPT-5.4 最大"]
    y-axis "K tokens" 0 --> 1100
    bar [128, 200, 272, 1000]