# Comma vs ChatGPT Canvas: Drafting a Page With AI vs Getting People to Review It Canonical: https://commareports.com/vs/chatgpt-canvas Published: 2026-09-28 > ChatGPT Canvas is a great place to write and render a page with the model. What happens when the page needs other people — anchored comments from reviewers, restricted links, one URL across revisions, agent-side publishing — and when to use each. # Comma vs ChatGPT Canvas ## TL;DR **Canvas is where you and the model write the page. Comma is where other people review it.** Canvas puts a draft next to the chat, lets ChatGPT edit it in place, and can render HTML so you see the result without leaving the window. That is a very good way to _make_ a page. It is not designed for the step after: sending the page to five people and collecting their objections on the exact lines they object to. Most AI-written pages that end up in Comma started in a chat. The two tools sit on either side of "send". ## At a glance | | **Comma** | **ChatGPT Canvas** | | ------------------------------- | ---------------------------------------------------------- | -------------------------------------------------- | | **Made for** | Reviewing HTML that already exists | Drafting text or code together with ChatGPT | | **Who comments** | Your readers — anchored to text selections and table cells | ChatGPT, when you ask it to review the draft | | **Input** | Any HTML — from ChatGPT, Claude, a notebook, CI, an agent | What you and ChatGPT write in that conversation | | **Who can open the link** | Public, password, invite-only, team or email domain | Depends on ChatGPT's sharing options for your plan | | **Reader needs an account?** | No, to read or to comment | No, to read a shared link | | **Regenerate without new link** | Yes — revisions at one URL, diff between any two | Versions live inside the canvas and its chat | | **Agent can publish** | Yes — MCP server and REST API, scoped `comma_sk_…` tokens | No — a person works in the ChatGPT app | | **Price** | Free — pay only for routine AI compute | Included with ChatGPT plans | OpenAI changes Canvas and sharing regularly; check their help center for what your plan includes today. ## What Canvas is good at **Editing with the model, not just prompting it.** Highlight a paragraph and ask for it shorter, or ask for a different reading level across the whole draft, and the change lands in place instead of in a new reply you have to copy from. For writing, that is a real improvement over chat. **Seeing code run.** HTML and simple React render in the canvas, so a one-off dashboard, chart or calculator can be built and checked in a single window. **Self-review.** Asking ChatGPT to comment on its own draft catches the obvious problems — vague claims, inconsistent numbers — before a human ever sees it. ## What Comma is good at **Getting a decision out of people.** The pages that land in Comma are usually meant to be signed off: an analysis, a weekly summary, a proposal, an incident write-up. That needs a few things a chat product doesn't aim for: - **Human comments on the specific line.** A reader selects the number that looks wrong and pins a thread to it; the next reader sees the question in place. See [comment on HTML](/comment-on-html). - **Access that matches the content.** Internal numbers shouldn't sit at a public URL. Comma links can be invite-only, password-protected, or gated to your team or email domain — [sharing options](/docs/sharing). - **One URL across versions.** Fix what reviewers flagged, update the same report, and the link you already sent now shows the fixed version. Old revisions stay diffable and open threads carry across. - **Pages from anywhere.** The canvas export, the Claude artifact, the CI coverage report and the notebook all get reviewed in the same place. - **Agents that close the loop.** Over [MCP](/mcp), a coding agent publishes the page itself, reads the comments on its next run and replies in-thread — [let an agent respond to comments](/agents/let-an-agent-respond-to-comments). ## Where each one wins ### Writing the first draft **Canvas wins.** Inline edits with the model are the whole point of it, and Comma doesn't try to be a writing tool. ### Asking the model to critique its own work **Canvas wins.** It is one click, and the suggestions are good enough to fix before anyone else reads the page. ### Asking your team or a client to critique it **Comma wins.** Five reviewers, comments on the exact sentence, a link you can restrict, and no ChatGPT account needed to take part. ### A page that gets regenerated every week **Comma wins.** A [routine](/features/routines) or CI job updates one URL every run, so the link pinned in your channel keeps working and last week's discussion stays attached. ## Moving a canvas into Comma 1. Ask ChatGPT: _"Give me this canvas as one self-contained HTML file — inline the CSS, load any libraries from a CDN."_ 2. Paste it into [Comma](https://commareports.com/new) — or into the free [HTML viewer](/tools/html-viewer) first to check it renders, then hit **Get a shareable link**. Writing in Markdown instead? Use the [Markdown to HTML converter](/tools/markdown-to-html). 3. Send the URL. Reviewers comment without creating an account. The full walkthrough, including what breaks and why, is in [share HTML an AI chat generated](/agents/share-chatgpt-html-output). ## Try Comma Take the next canvas you were about to paste into a doc or screenshot into a thread, and send it as a page people can comment on instead. **[Publish your first report →](https://commareports.com/)** ### Related - [Comma vs Claude Artifacts](/vs/claude-artifacts) - [Share HTML an AI chat generated](/agents/share-chatgpt-html-output) - [Share Gemini Canvas output](/agents/share-gemini-canvas-output) - [Comma vs Google Docs](/vs/google-docs)