A 170-page real-world case study: Why Writing Blocks cannot replace Canvas

I am not posting this because I dislike change. I am posting it because Canvas was removed before there was a replacement that could support the same kind of work.

For me, Canvas was not a minor convenience. It was the reason ChatGPT became a serious working environment rather than simply a place where I asked questions and copied answers.

Over several months, I used ChatGPT and Canvas to write and revise a manuscript of roughly 170 pages. We worked chapter by chapter, often spending an entire evening on a single chapter. The work was iterative: discussing an argument, rewriting a section, moving paragraphs, comparing alternatives, restoring an earlier formulation, checking whether a change had weakened another part of the text, and then continuing from there.

Canvas made this possible because the conversation and the document were separate, but connected.

The conversation was where I could think, question, challenge, and refine ideas. The Canvas remained the stable document we were actually working on.

That distinction matters much more than it may appear from a feature list.

I also use ChatGPT professionally for complex emails, technical statements, customer communication, regulatory questions, and documents that cannot be written properly in one prompt. Some of these texts go through many revisions. A sentence may need to be made firmer without becoming aggressive. One paragraph may need to be moved because the logic works better elsewhere. A legal or technical qualification may have to be added without changing the tone of the rest of the document.

This is exactly where Canvas was useful.

Writing Blocks do not provide the same workflow.

They are editable, but they remain part of the chronological chat. As the conversation continues, the document moves upward and eventually disappears from view. I then have to scroll back, find the correct block, check what changed, return to the conversation, give the next instruction, and repeat the process.

That may be acceptable for a short email or a single paragraph. It is not an efficient way to work on a long or difficult document.

Opening a Writing Block in full-screen mode does not solve the problem either. It replaces the conversation on screen instead of allowing me to see the conversation and the document at the same time. The point of Canvas was not simply that the text could be edited. The point was that the document stayed visible while the discussion continued beside it.

In other words, Canvas was a workspace.

Writing Blocks are editable outputs inside a chat.

Those are not the same thing.

The current desktop behaviour makes this even more frustrating. While responses are generated, the visible area may move, and the text I am trying to review can scroll out of view. That is irritating in a normal conversation. In a document workflow, it becomes a genuine obstacle.

I understand that products evolve and that OpenAI may want to simplify the interface or replace older features with a new approach. I have no objection to that in principle. But a replacement should at least preserve the essential capabilities of the workflow it replaces.

For serious long-form work, that means:

  • the document remains visible and persistent;

  • the conversation and document can be viewed at the same time;

  • individual sections can be revised without regenerating the whole text;

  • changes elsewhere in the document are not introduced unintentionally;

  • earlier versions can be restored reliably;

  • long documents remain easy to navigate;

  • the document does not become buried in the chat history.

Canvas provided most of this in a simple and practical way.

Its removal has reduced the value of ChatGPT for my actual use cases. I used the product intensively because it allowed sustained collaboration on difficult texts over many hours and many sessions. That is a very different kind of usage from asking isolated questions or generating a short draft.

I suspect this difference may not be visible in simple usage statistics. A user may open Canvas only once during an evening, but then spend several hours working inside it, revising a chapter or a professional document. The number of clicks may be low. The value of the session is not.

Please restore Canvas as an optional workspace for current and future models.

If the original Canvas cannot return, then please provide a genuinely equivalent side-by-side document workspace before access to the old workflow disappears completely.

I am a paying user, and I would prefer to continue using ChatGPT for this kind of work. But if there is no longer a proper environment for long-form, iterative writing, I will eventually have to move these projects to another platform that offers one.

That is not meant as a threat. It is simply the practical consequence of removing a tool that had become central to the way I work.

The removal of Canvas reduced the value of ChatGPT for many of my workflows also. Now I don’t see much of a reason to keep paying for it when I’m already paying for Claude Max.

Same for me. I work extensively in Canvas, and without it my Plus account is worthless. I’m currently on a mission to find an alternative (Like Mistral Vibe), but also hoping they reverse their decision.