Claude and ChatGPT both let an AI build a page, doc, or app, but the tools have diverged. In 2026 OpenAI retired Canvas for inline writing and code blocks in the chat, and shipped Codex Sites, which deploys apps to a URL. Claude still has Artifacts you can publish. Either way the friction is the same. You still have to share what you made across tools, put it on your own domain, and avoid getting locked in. Here is what each can and cannot do, and where a portable platform fits.
Where each tool stops
- Claude Artifacts. Publishing gives a public claude.site link (no custom domain), it is public-or-nothing with no per-person access, only Claude can edit it, and AI-powered artifacts make the viewer sign in.
- ChatGPT writing and code blocks. Canvas is gone. ChatGPT now uses inline writing and code blocks saved to your Library. You can share a read-only conversation or code-block link, but there is no standalone page on your own domain, and it stays inside ChatGPT.
- OpenAI Codex Sites. The closest option. Codex can deploy a web app to a public URL and even a custom domain, but it is Codex-only, built for apps rather than documents, and gated to paid business plans, with your app living on OpenAI.
What a portable platform adds
- Any agent, one home. Create or edit from Claude, ChatGPT, Cursor, or Gemini, never locked to one vendor.
- Any format, your domain. Pages, live apps, and real .docx, .xlsx, and .pdf, served at docstash.ai/<slug> or on docs.yourcompany.com.
- Private by default, no lock-in. Share with specific people, your org, or the public, and keep your files in your own storage.
FAQ
What happened to ChatGPT Canvas?
OpenAI retired Canvas in 2026 and replaced it with inline writing blocks and code blocks in the chat, saved to your Library. For apps it added Codex Sites, which deploys to a URL. Neither gives you a standalone document page on your own domain that other agents can edit.
How is this different from OpenAI Codex Sites?
Codex Sites deploys apps to a URL with custom domains, but only from Codex, mainly for apps, on paid business plans, hosted on OpenAI. DocStash works from any agent, handles documents and real office files too, and keeps your files portable in your own storage.
Do Claude artifact links expire?
No. Published Claude artifacts stay up and anyone with the link can view them without an account. The limits are the claude.site URL, public-or-nothing sharing, and Claude-only editing.
Do I have to pick one tool?
No. DocStash sits alongside them. Keep building in Claude, ChatGPT, or Codex, and stash the result so it is portable, shareable, and on your domain.
Make what your AI builds portable
Keep building in Claude or ChatGPT. Stash the result so it works everywhere.
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