Still Writing Without AI? These 7 Tools and Prompts Will Transform Your Book Forever

📚 Table of Contents

1. Why Writers Use AI in 2025
2. Our Testing Criteria
3. Sudowrite — #1 for Fiction Writers
4. ChatGPT — The Universal Writing Partner
5. NovelAI — Visual Storytelling + Text
6. Squibler — Your Book as a Project
7. Shy Editor — For Editing & Stylistic Control
8. 🆕 DeepL Write — AI for Multilingual Writing
9. 🆕 Claude 4 Opus — Creative Power in Any Language
10. Comparison Table
11. Recommendations: Which AI Suits You Best?

 

🔍 Why Writers Use AI in 2025

Writers now use neural networks not just to speed up the process, but to generate ideas, dialogues, scenes, even entire worlds. From fantasy to nonfiction, AI has become the second pen in the author’s hand.

 

🧪 How We Tested

We tried each tool on the following tasks:

• Structuring a chapter
• Generating a fictional scene
• Improving writing style
• Writing dialogue
• Planning a book

 

🥇 Sudowrite — #1 for Fiction Writers

Description:
Sudowrite is an AI built for fiction writing. It helps expand scenes, write dialogue, description, monologue, and even rewrite sections.

✅ Pros:

• Understands chapter context
• Tailored for genres like fantasy, drama, romance
• Functions as a “co-writer”

❌ Cons:

• English only
• Paid (from $19/month)
• Not ideal for technical or academic writing

💬 Sample Prompt:
Prompt: "Describe a dark fantasy forest where time slows down."
Output:
“The forest exhaled twilight. Vines coiled like serpents, and the wind whispered secrets in languages long forgotten...”

Sudowrite

 

🧠 ChatGPT — The Universal Writing Partner

Description:
ChatGPT (especially GPT-4o) remains a favorite among authors for writing, editing, planning, and idea generation.

✅ Pros:

• Understands all genres
• Fast generation of chapters, outlines, and dialogue
• Works great across formats (novels, short stories, essays)

❌ Cons:

• Doesn’t write for you — needs precise prompts
• May lack advanced stylistic nuance without fine-tuning

💬 Sample Prompt:
Prompt: "Give me a 3-act structure outline for a sci-fi novel about lost time."
Output:
Act I: The protagonist discovers a time rift... Act II: They’re trapped in an alternate history... Act III: They sacrifice their timeline to fix reality.

 

ChatGPT

 

🌌 NovelAI — Visual Storytelling + Text

Description:
A unique AI for fiction writers that includes image generation, character design, and world-building. Great for authors creating immersive universes.

✅ Pros:

• Genre-based generation (sci-fi, fantasy, horror)
• Visualizes characters
• First-person storytelling

❌ Cons:

• English only
• Interface requires some learning
• Paid only (from $10/month)

💬 Sample Prompt:
Prompt: "Generate an image and description of a post-apocalyptic city seen from a rooftop."
Output:
“The skyline was skeletal, glass cracked and flickering with forgotten neon. Silence reigned, broken only by the creak of the wind-blown billboard.”

 

NovelAI

 

📕 Squibler — Trello for Writers

Description:
A project-based writing platform: scene boards, chapters, AI paragraph generator, and “30-day novel” templates.

✅ Pros:

• Simple interface
• Scene/chapter generator
• Progress tracker

❌ Cons:

• Generation limited to templates
• Better for structure than creativity

💬 Sample Prompt:
Prompt: "Write the first scene of a thriller novel where the protagonist wakes up in a lab."
Output:
"Fluorescent lights buzzed. Her wrists were strapped to a table. She didn't remember her name, only the number on the wall: 17."

 

Squibler

 

📝 Shy Editor — For Editing & Version Control

Description:
Like Google Docs with AI: stylistic rewrites, tone shifts, tracked edits, and chapter-by-chapter workflows.

✅ Pros:

• Rewrites by tone (dramatic, romantic, harsh)
• Tracks version history
• Ideal for collaborative editing

❌ Cons:

• Weak at generating new scenes
• Free version limited (credits-based)

💬 Sample Prompt:
Prompt: "Make this paragraph more emotional and poetic."
Output:
"Tears traced her smile, silent messengers of memories too bright to forget..."

 

Shy Editor

 

🌍 DeepL Write — AI for Multilingual Writing

Description:
DeepL is known for high-quality translation, but its new service DeepL Write offers advanced editing and style improvements in 30+ languages including Russian, French, Spanish, German, and more.

✅ Pros:

• Supports many languages
• Enhances clarity, grammar, and expression
• Perfect for multilingual authors

❌ Cons:

• Not ideal for generating long-form content
• Acts more as an editing assistant

💬 Sample Prompt:
In Russian: “Make this paragraph more literary in French.”
Output: Suggests 2–3 stylistic options with varying tone and formality.

 

DeepL

 

🎭 Claude 4 Opus — Creative Writing in Any Language

Description:
Claude 4 Opus by Anthropic is one of the most advanced AI models in 2025. It supports long-form writing, understands tone and nuance, and excels in fiction genres like post-apocalyptic drama, fantasy, or psychological thrillers.

✅ Pros:

• Supports 30+ languages
• Rich, atmospheric storytelling
• Continues complex scenes and dialogue

❌ Cons:

• Available via Poe/API only
• Limited or paid access in some countries

💬 Sample Prompt:
Prompt: “Continue a post-apocalyptic drama novel in English, with dialogue and atmospheric description.”
Output:
"The sky was the color of rusted steel, thick with ash that drifted like forgotten snow. Leah tightened her grip on the cracked leather strap of her pack and looked west, where the ruins of the old city clawed at the horizon like broken teeth.
“Do you think anyone’s still out there?” Caleb asked, his voice barely louder than the wind.
Leah didn’t answer right away. The silence had weight now — a language of its own.
“If they are,” she said finally, “they're hiding from the same ghosts we are.”

 

Anthropics Claude

 

📊 Comparison Table

Tool	Specialization	Languages	Generation	Strengths	Price
Sudowrite	Fiction Writing	🇬🇧	✅	Scenes, dialogue, emotion	From $19/month
ChatGPT	Universal Assistant	🌍	✅✅	Planning, structure, style	From $20/month
NovelAI	Visual + Text Storytelling	🇬🇧	✅	Imagery + characters	From $10/month
Squibler	Structural Writing Tool	🇬🇧	⚠️	Timeline, scenes, project tracker	From $9/month
Shy Editor	Stylistic Editor	🇬🇧	⚠️	Tone, rewrites, editing flow	Free / Paid
DeepL Write	Multilingual Editing	🌍	⚠️	Language precision, clarity	Free
Claude 4 Opus	Creative Writing in Any Genre	🌍	✅✅	Emotional, poetic, long-form scenes	Via Poe/API

 

🧭 Which AI Tool Should You Choose?

• ✍️ For fiction writers / fantasy lovers → Sudowrite or NovelAI
Ideal for building immersive worlds and emotional prose

• 📖 For nonfiction writers / bloggers → ChatGPT + Shy Editor
Great for idea generation, logical flow, and edits

• 🧩 For structured writers and planners → Squibler
Helps map out chapters, timelines, and scenes

• 💬 For style-conscious authors → Shy Editor + ChatGPT
Perfect for refining tone and voice

• 🌍 For multilingual writers → DeepL Write
Supports clean, expressive writing in 30+ languages

• 🎭 For emotional, atmospheric writing → Claude 4 Opus
Excels at dramatic tone, dialogue, and depth

 

🔗 Useful Links:

• Prompt Engineering Guide
• Best AI Tools for Marketing in 2025
• Sudowrite
• ChatGPT
• NovelAI
• Squibler
• Shy Editor
• DeepL
• Anthropics Claude