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5. 成本表 2026-07-12 v2.1: 按当日查证实价(市场 H100 $1.87-2.99/h; AWS p5e blocks $4.97/GPU·h,
7月1日+20%后)+ 实测 amp 1.56×。旧 v1 锚 AWS-A100-savings 已废; 用户 H200 数据点按指示不进邮件,
仅作 $16.7/EF 最差上限留档。完整推导+价格出处: docs/campaign/COST_MODEL.md
-6. **发送门: stage1b_amp (58.8k 全 epoch, GPU1) 完成且 ≈1.28 档才发**——邮件说了 "validated
- against the fp32 reference this week"。若 amp 在 epoch 尺度掉链子 → 表格回退 TF32 (×1.5) 并删该句
+6. ~~发送门~~ **CLEARED (07-12 晚): stage1b_amp 终值 1.2868 vs fp32 1.2808 (Δ+0.006 噪声带内),
+ 零 guard,1.56× 全程成立**——已发邮件中 "validated against the fp32 reference this week" 完全闭合
---
# Draft 7 — reply to Ben's "LLM bullshit" Overleaf-comments email (2026-07-12 晚)