Claude Fable 5 vs Kimi K3 for book writing

## The arithmetic (with slack, because life doesn't give you 52 weeks)

70,000 words ÷ 52 weeks = 1,346 words/week. Forget that number. You will lose weeks to sick kids, work crunches, and holidays. Plan on **45 productive weeks**:

- 70,000 ÷ 45 = **~1,550 words/week**

A realistic beginner's drafting pace — tired, unsure of the plot, no established habit — is **300–450 words per hour**, not the 1,000 you'll read about online. Call it 400.

- 1,550 ÷ 400 = **~4 hours of actual drafting per week**
- Split sensibly: **four sessions of ~400 words…

## The arithmetic

- 70,000 words, 52 weeks, minus the two collapse months (below) → plan on roughly 46–47 weeks of real drafting.
- 70,000 ÷ 47 ≈ **1,500 words/week**. That's your number.
- At a realistic beginner's pace — and only if you ban mid-draft editing — most people produce 300–500 words per hour of focused drafting. So 1,500 words a week means **4–5 sessions of ~45 minutes, roughly 350 words each.**
- The whole project costs about **5 focused hours a week**. That's the honest headline: this is not a speed problem. It's a five-hours-a-…