GPT-5.6 Luna vs Kimi K3for writing emails

**Subject:** Proposal follow-up — added ROI summary

Hi [Name],

I’m following up on the proposal I sent three weeks ago. I’ve added a one-page ROI summary using conservative assumptions to make evaluation easier.

If this isn’t a priority—or you’ve chosen another direction—just reply “pass,” and I’ll close the loop. Otherwise, would a 15-minute conversation next week be useful?

Best,  
[Your Name]

**Subject:** Re: [Proposal topic] — one quick update

Hi [Name],

One thing worth sharing since I sent the proposal: [similar client] just saw [specific result — e.g., 30% faster onboarding] using the approach on page 3. Seemed directly relevant to [their goal].

If timing or priorities have shifted, totally fine — a one-line "not now" and I'll close the loop on my end.

Best,
[Your name]

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~50 words. Swap in a real result, insight, or resource — the key is that it gives them something useful even if they never buy. The easy out often *gets…