Real 2026 prices for the major tools, what's actually included, and where the hidden costs live — so you can budget for a whole novel, not just month one.
Prices checked: July 2026AI novel writing software costs between $4 and $59 per month in 2026 — but the sticker price is only half the story. Some subscriptions include AI usage (with caps), some charge for the platform and make you pay the AI provider separately, and some include an allowance. Novelcrafter starts at $4/month plus your own AI costs; Sudowrite runs $19–$59/month with monthly credit caps; NovelAI is $10–$25/month with unlimited text; ProseEngine is €9–€29/month with an AI-credit allowance included ($10–$30/month) — or free, with AI fueled by prepaid credit packs from €5.
Every AI writing tool uses one of three models. Knowing which one you're buying tells you where the real cost shows up three months in.
One monthly fee that includes AI usage — until you hit the cap. Heavy drafting months can run out of credits, and on most tiers unused credits don't roll over.
How Sudowrite works.
The subscription pays for the software only. AI usage is billed separately by OpenAI, Anthropic, or Google at raw rates. Cheapest total cost, but you set up the key yourself.
How Novelcrafter works — and ProseEngine's BYOK mode (no markup).
One fee, unlimited generation. Predictable, but you're locked to the vendor's own models and the tiers differ mainly in how much story context the AI remembers.
How NovelAI works.
ProseEngine deliberately mixes the models so the writer picks: paid plans include a monthly AI-credit allowance (model 1, but the packs never expire), bring-your-own-key runs at raw provider rates with no markup (model 2), and prepaid credit packs work on any plan including Free — no subscription required to use AI.
| Tool | Entry plan | Mid plan | Top plan | AI usage included? | Free option |
|---|---|---|---|---|---|
| ProseEngine | €9/mo (€99/yr) | €19/mo (€190/yr) | €29/mo (€261/yr) | $10–$30/mo allowance included, or BYOK at raw rates (no markup) | Free plan, no card — AI via €5+ credit packs |
| Sudowrite | $19/mo ($10/mo annual) | $29/mo ($22/mo annual) | $59/mo ($44/mo annual) | Credits included but capped (225K–2M/mo); lower tiers don't roll over | One-time trial (~10K credits) |
| Novelcrafter | $4/mo | $8–$14/mo | $20/mo | No — bring your own key; AI billed separately by the provider | Trial only |
| NovelAI | $10/mo | $15/mo | $25/mo | Unlimited text generation on all tiers (vendor's own models) | Limited trial |
| Campfire | from $0.25/module/mo | — | ~$12.50/mo all modules | Planning/worldbuilding-first; not an AI drafting suite | Limited free access |
Prices checked July 2026 from each vendor's public pricing page and current reviews; ProseEngine prices in EUR, others in USD as listed by the vendor. Annual billing discounts shown where offered.
The honest math most pricing pages skip: the software subscription is usually the bigger cost, not the AI. At raw API rates, drafting and revising an 80,000–100,000-word novel typically costs a few dollars to a few tens of dollars in model usage, depending on the model and how many passes you run. The wide range is real — a frontier model with heavy regeneration can cost 10× what an efficient model with disciplined revision does.
So a realistic six-month budget looks like: €54–€174 of software (entry to top plan) plus AI usage — where the AI portion is often under €20 on efficient models with BYOK, or simply covered by a plan's included allowance. The expensive failure mode isn't the tool — it's paying for capped credits you lose at the end of a slow month.
Free — 3 books, the full editor, daily AI chat, weekly scene scoring, one free preview of each premium AI feature, DOCX/JSON export. No credit card.
Writer, €9/month (or €99/year — 1 month free) — inline AI editing tools (Continue, Rewrite, Describe, Tone, Shrink), consistency drift detection, voice check, EPUB/PDF export, and a $10/month AI-credit allowance.
Author, €19/month (or €190/year — 2 months free) — everything in Writer plus full AI scene generation, story bible enforcement, canon audit, author voice packs, quality gate, AI story plan, and a $20/month allowance.
Studio, €29/month (or €261/year — 3 months free) — everything in Author plus collaboration, multi-voice audiobook, advanced story analytics, and a $30/month allowance.
Two honest details you should know before comparing: paid plans bill from day 1 — there is no free trial (the Free plan is the trial, and it doesn't expire). And prepaid credit packs (€5 / €15 / €40) never expire and work on any plan including Free, while the monthly allowance included with a paid plan lasts as long as the subscription does.
Between $4 and $59 per month in 2026. Novelcrafter starts at $4/month plus separate AI costs; Sudowrite runs $19–$59/month with credit caps; NovelAI is $10–$25/month unlimited; ProseEngine is €9–€29/month with an AI allowance included, or free with prepaid credit packs from €5.
ProseEngine's free plan needs no credit card: 3 books, the full editor, daily AI chat, weekly scoring, and one free preview of each premium AI feature. Most competitors offer a one-time trial instead.
Depends on the tool. Sudowrite's Hobby and Professional credits reset monthly (only Max rolls over, for 12 months). ProseEngine's prepaid packs never expire; the allowance included with a paid plan lasts as long as the subscription.
Usually yes, if you're comfortable creating one. BYOK means paying the AI provider's raw rates — in ProseEngine with no markup added. Sudowrite and NovelAI don't offer BYOK at all.
Typically a few dollars to a few tens of dollars in raw AI usage for an 80–100K-word novel, plus the software subscription — which is usually the larger of the two costs over six months.
Full editor, no credit card, and one free preview of every premium AI feature — including full scene generation.
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