How much does it cost to write a book with AI?
At Writers Room a 90,000-word novel with revising uses about 500 credits, and a short story or a short screenplay about 40–60. Credits come in packs from $25 or monthly plans, and on Studio ($39 a month) work run on your own AI keys costs nothing.
What things cost
Costs are measured on real projects, and they grow with the manuscript, because the later chapters are written with the earlier ones in view:
- One chapter through all seven roles: ~8–10 credits
- Short story, TV episode, short screenplay: ~40–60 credits
- 45,000-word book, first pass to publish-ready: ~120 credits
- The same book with ordinary revising: ~250 credits
- 90,000-word novel with revising: ~500 credits
- A cover or illustration: 2 credits
- Narrating a 90,000-word novel on our voice: ~1,040 credits
What a credit is
One credit is 10,000 tokens of AI work, weighted by the model: Haiku and Sonnet count once, Opus five times. Each run sets aside 4 credits before it starts (20 on Opus) and gives back whatever it did not use, so you are charged for what the run actually did.
Packs, plans or Studio
- Packs are one payment, and their credits never expire: 100 for $25, 300 for $59, 1000 for $149.
- Plans refill every month and do not roll over: Starter $29 for 150, Author $79 for 500, Pro $199 for 1500. Author is sized for a novel with revising, or a book a month without.
- Studio is $39 a month for writers with their own AI accounts: everything run on your keys costs 0 credits, and its 25 credits cover what you cannot bring a key for yet, such as images. It has a 7-day free trial.
If you change your mind
Packs can be refunded within 30 days if you ask. Plans are not refunded; cancel any time and keep the month you paid for.