Medium on Monday introduced TK, a new app designed to embed artificial intelligence more deeply into the writing process. The tool integrates an AI assistant directly into the editor: users can invoke help by typing “@TK” followed by a request or prompt.
Name and purpose
The label “TK” comes from publishing and journalism, where it serves as a placeholder for material “to come”; the unusual “K” makes the marker easier to spot in copy. Medium repurposes that convention: TK is intended to help writers fill gaps in their drafts, from quick factual checks to retrieving previously saved notes.
What TK can do
- Answer quick reference questions that would normally require switching tabs, such as how many days are in a particular month.
- Pull in snippets or notes the author previously saved in the app while developing ideas.
- Provide editorial feedback and headline suggestions, and match drafts to the style guides used by Medium publications.
Medium says TK ships with specific skills for editorial feedback, headline feedback, and similar tasks to better fit editorial workflows.
Transparency and authorship concerns
Medium acknowledges AI raises the risk of low-quality content and blurs lines between human- and AI-authored work. To address this, TK lets authors publish notes that transparently explain how they used AI in their writing. In a blog post about the launch, Medium wrote: “This is a start of what we believe is required to publish in the AI era, which is to make the provenance of writing clear, transparent, and inspectable, right down to the prompting and source material.”
The launch comes amid ongoing debates in the literary and publishing world: multiple authors have lost book deals amid suspicions of AI use, and some literary prizes have faced scrutiny when winners were suspected of using AI assistance. There are also questions about the reliability of AI-detection tools in distinguishing between writing produced entirely by AI and text where AI only assisted.
Medium defends its approach by arguing these distinctions will matter less over time and highlights AI’s benefits, stating that “artificial intelligence makes writing more important, not less,” and calling AI “a technology that has the power to amplify human intelligence and it uses the written word as a foundation.”
Additional features and availability
- TK helps users remember and organize previously written material and can suggest writing prompts.
- It can optionally connect to a user’s own AI agent via TK’s MCP server or the Claude skill so the app can better understand projects, viewpoints, and information stored in an agent’s memory.
- The app includes a social layer that incorporates human feedback, enabling writers to share early drafts and receive commentary.
At launch TK is available on the web; Medium says a desktop app is on the roadmap. TK can import and export Markdown but is not a Markdown-first app. Writing in TK is not encrypted because the app is built for collaboration, although users can set access control permissions on their work.
Medium, which it says is profitable, also notes TK will be free for users with a Medium account.
