Free Custom GPT directory
Custom GPTs for Writers
Edit for clarity, outline a book or feature, and make dense text easy to read without losing your voice. Here are the 5 public Custom GPTs we would open first, what each one is good at, and the exact task to try.
- Free for everyone
- Opens in ChatGPT, also on the free plan
- Links checked 5 October 2026
Go further than a Custom GPT
Make your own AI the expert, not someone else’s GPT
A Custom GPT is someone else's assistant, in ChatGPT only. Skills and AI plugins work inside the AI you already use, with your own files and your own way of working.
AI skills for writers
Ready-made expert instructions for one task each. Add them to ChatGPT, Claude, Microsoft Copilot or Grok and your AI does that task the way a specialist would.
- Accessibility compliance auditor
- Actuarial reserving assistant
- Ads copywriter
- Agent performance analysis assistant
One AI plugin with everything for your job
Every skill, prompt and app for one job in a single download. It installs as your own Custom GPT in ChatGPT, a Claude project, a Copilot agent and more.
- Ghostwriter
- Medical Writer
- Proofreader
- Author
Also for writers: ready-to-use prompts · AI courses · MCP servers · all skills · all AI plugins
The directory
The 5 best free Custom GPTs for writers
Each one opens on chatgpt.com in a new tab. Start with the suggested first task: it shows in a minute whether the GPT fits your work.
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Text Editor AI
Editing assistant for grammar, proofreading, formatting, shortening, and expansion.
Try this firstProvide a draft and ask for clearer language while preserving your voice and meaning.
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CanvasPRO — Book Writer GPT
Book-writing assistant covering outlines, plots, characters, dialogue, and manuscripts.
Try this firstDevelop a book outline, explore a character arc, or revise a scene around a specific writing goal.
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Non-Fiction Writing Assistant
Helps develop nonfiction-book outlines, chapter drafts, and supporting book material.
Try this firstTurn a topic into a chapter outline, then draft individual chapters from your research and notes.
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Concise Writer
Transforms complex text into clearer, web-friendly content.
Try this firstRewrite a dense article introduction for a general audience while preserving its meaning and key qualifications.
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Feature writer
Assistant for in-depth, human-focused feature narratives and story development.
Try this firstDevelop story angles, interview questions, and an outline from your reporting notes.
Getting good results
Four habits that make any Custom GPT better
- Be specific. Say the task, who it is for, your limits and the format you want back.
- Give it your material. Paste the approved source: a policy, brief, requirements or anonymised notes.
- Ask what is fact and what is guess. Let it separate what you gave it from its assumptions and gaps.
- Check before you use it. Verify sources, numbers and any claim that matters.
A starting prompt for any GPT
Help me complete [task] for [audience]. Use the source material below and follow these constraints: [constraints]. Produce [output format]. Ask about missing information that would materially change the result. Distinguish facts from assumptions and flag anything that needs verification.
Replace the parts in [brackets]. More like this in the prompts for writers.
Which one should you use?
Custom GPT, skill or AI plugin
Skill
One task, done like an expert
- Works in your own AI
- ChatGPT, Claude, Copilot, Grok
- Pick only what you need
AI plugin
Your whole job, in one install
- All skills, prompts and apps for your job
- 8 AIs, incl. your own Custom GPT
- Included in membership
Questions
Good to know
Are these Custom GPTs free?
Yes. They are public GPTs in OpenAI's GPT Store. Anyone with a ChatGPT account can open them, including on the free plan; free accounts have lower daily limits than paid ones. Complete AI Training does not charge for this list.
How do I open a Custom GPT?
Click "Open in ChatGPT". The GPT opens on chatgpt.com (sign in if asked) and you type your request in the chat box, just like in normal ChatGPT. To keep it handy, click its name at the top and choose "Keep in sidebar".
How were these GPTs for writers chosen?
We picked them for how well they fit everyday writers tasks, based on their public descriptions, and checked that every link worked on 5 October 2026. It is a curated shortlist, not a lab test: creators can change or remove a GPT at any time.
Is my data safe in a Custom GPT?
A Custom GPT is made by another person or company, and some send your messages to outside services. Do not paste confidential, customer or patient information into one unless your organisation has approved it. Use anonymised examples instead.
What is the difference between a Custom GPT, a skill and an AI plugin?
A Custom GPT is someone else's ready-made assistant inside ChatGPT. A skill is a set of expert instructions you add to your own AI (ChatGPT, Claude, Copilot or Grok) for one task. Our AI plugin for your job bundles the skills, prompts and apps for that job into one assistant you install yourself, so it works the way you work.
GPT names and descriptions come from their public listings on chatgpt.com. Complete AI Training is not affiliated with OpenAI or with the creators of these GPTs. OpenAI is moving business (Enterprise) Custom GPTs to plugins; see OpenAI's guidance.
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