Moonshot AI · Strong all-rounder
Write fiction with Kimi K3.1 Pro
Yes. On WriteWithPaige, writers on a paid plan can pick Kimi K3.1 Pro, made by Moonshot AI, for any reply in their story. It reads your chapters and Story Bible and writes into your book, the same way Paige does. Each Kimi K3.1 Pro reply uses credits: about 37–102 for a chat reply and about 70–166 for a new chapter. Paige stays the default and is included in every plan.
Updated October 23, 2026
Kimi K3.1 Pro at a glance
- Made by
- Moonshot AI
- Released
- October 23, 2026(The Next Web: Kimi K3.1 Pro launch)
- Context window
- 1 million tokens, enough for several full novels(Moonshot AI: Kimi K3.1 Pro quickstart)
- Group on WriteWithPaige
- Strong all-rounder
- Credits a reply
- About 37–102 for chat, 50–132 to continue, 70–166 for a new chapter
What Moonshot AI says: Moonshot AI pitches it for coding, research and long, many-step tasks.(Moonshot AI: Kimi K3.1 Pro announcement)
What Kimi K3.1 Pro is good at, and where it's weaker
Good for
- It reads a million tokens at once, so a whole long book fits.(Moonshot AI: Kimi K3.1 Pro quickstart)
- The model before it, Kimi K3, placed second on the EQ-Bench creative-writing board.(Digital Applied: creative-writing leaderboards compared)
Weaker at
- It always thinks before it writes, so replies take longer to start.(Moonshot AI: Kimi K3.1 Pro quickstart)
- It is brand new: the launch figures are Moonshot's own and haven't been checked independently, and there are no fiction reviews yet.(The Next Web: Kimi K3.1 Pro launch)
Kimi K3.1 Pro or Paige?
Paige
Built for fiction and included in every plan. She knows the workspace best, runs Adventures, and writes the scenes you ask for within our content rules. No credits.
Kimi K3.1 Pro
A second voice from Moonshot AI. Moonshot's newest. Reads a whole long book at once and thinks before it writes. It follows Moonshot AI's content rules and uses about 37–102 credits a chat reply.
A simple way to choose: write with Paige, and when a scene stalls, ask Kimi K3.1 Pro for the same scene. Keep the reply you like.
Kimi K3.1 Pro compared with similar models
Same story, same workspace. These differ in voice, speed and credits.
| Model | Maker | Group | Best for in fiction | Context | Credits a replychat · continue · new chapter |
|---|---|---|---|---|---|
| Kimi K3.1 Pro | Moonshot AI | Strong all-rounder | Moonshot's newest. Reads a whole long book at once and thinks before it writes. | 1M tokens | 37–102 · 50–132 · 70–166 |
| Grok 4.7 | xAI | Strong all-rounder | Punchy voice, quick replies, happy to take creative risks. | 500K tokens | 32–90 · 35–107 · 35–107 |
| GLM 5.3 Prime | Z.ai | Strong all-rounder | Rich, descriptive long-form writing. | — | 44–125 · 49–148 · 49–148 |
| Gemini 4 Argon | Strong all-rounder | Strong all-rounder with a huge memory for long books. | 1M tokens | 32–89 · 36–107 · 40–112 |
Try Kimi K3.1 Pro in three steps
- 1
Create a free account
Start with Paige on a real chapter.
- 2
Choose a paid plan
Other models are part of every paid plan. Paige stays included.
- 3
Pick Kimi K3.1 Pro
Tap "Writing with: Paige" beside the chat box and choose Kimi K3.1 Pro. Add credits when you need them: packs from US$10 (€10 in the eurozone) for 1,000 credits.
Frequently asked questions
Can I write a novel with Kimi K3.1 Pro?
Yes. On WriteWithPaige, writers on a paid plan can pick Kimi K3.1 Pro, made by Moonshot AI, for any reply in their story. It reads your chapters and Story Bible and writes into your book, the same way Paige does. Each Kimi K3.1 Pro reply uses credits: about 37–102 for a chat reply and about 70–166 for a new chapter. Paige stays the default and is included in every plan.
How many credits does Kimi K3.1 Pro use?
About 37–102 credits for a chat reply, 50–132 to continue a chapter, and 70–166 for a new chapter. The lower number is a typical reply; the higher one is a long reply deep into a big book, because the model reads more of your story. Every reply shows what it used. Credits come in packs from US$10 (€10 in the eurozone) for 1,000 credits.
Does Kimi K3.1 Pro use my plan's daily messages?
No. Replies from Kimi K3.1 Pro are paid with credits, so they don't count against Paige's daily allowance. Switch back to Paige and your plan works as before.
Will Kimi K3.1 Pro write everything Paige writes?
Not always. Kimi K3.1 Pro follows Moonshot AI's content rules, so it may turn down some requests or tone a scene down. A turned-down reply still uses credits. Paige is one tap away and is included in your plan.
Do I need a Moonshot AI account or API key?
No. You pick Kimi K3.1 Pro inside WriteWithPaige and pay with credits. There is nothing to set up with Moonshot AI.
Is Kimi K3.1 Pro better than Paige?
It depends on the scene. Paige is built for fiction, knows the workspace best and costs nothing extra. Kimi K3.1 Pro gives you a second voice: try it on a scene you're stuck on and keep whichever reply you like. Adventures always run on Paige.
Keep exploring
All AI models
Every model you can write with, side by side, with credits per reply.
Kimi K3.1 Pro vs Claude Opus 5.5
Head-to-head for fiction writers.
Write fiction with Grok 4.7
Punchy voice, quick replies, happy to take creative risks.
Write fiction with GLM 5.3 Prime
Rich, descriptive long-form writing.
Write fiction with Gemini 4 Argon
Strong all-rounder with a huge memory for long books.
AI fiction writer
How Paige drafts, continues and edits a novel with you.
Best AI tools for fiction
How the main AI writing tools compare for novelists.
Plans and pricing
What each plan includes. Paige comes with every plan.
Sources
Facts about each model come from its maker and the reviews below. Credit ranges come from WriteWithPaige. We don't publish our own benchmark scores.
Write your next chapter with Kimi K3.1 Pro
Start free with Paige, choose a paid plan, then pick any model for any reply.
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