GPT‑4.5: $75/1M tokens, 38% → 38/75 ≈ 0.51% per $
Claude Sonnet 3.7: $15/1M tokens, 62.3–70.3% → 62.3/15 ≈ 4.15% &amp; 70.3/15 ≈ 4.69% per $
Thus, ~4.15/0.51 ≈ 8.2× to 4.69/0.51 ≈ 9.2× more cost‐effective.