# 0.3.4 The same marks on both AI vendors (/how-ai-works/markdown/both-ai-vendors) --- type: Document title: "0.3.4 The same marks on both AI vendors" description: "Where Claude and ChatGPT let you see the marks, keep a page as a file, make a web page and turn formatting up or down, as checked on 16 October 2026." status: stable order: 13.4 ksor: owner: team:panaversity audience: [ public ] approval: by: process:panaversity at: 2026-10-17T01:47:35Z chapter: "0.3" part: "0" expert_status: null # as the Part 0 overview: Part 0 is optional on every route, after the skip quiz concepts: [ "0.3.4" ] last_verified: 2026-10-16 sources: - id: anthropic-pricing resource: https://claude.com/pricing title: "Plans & pricing (Claude, verified 2026-10-16)" - id: anthropic-sonnet-prompt resource: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-sonnet-5-5 title: "Claude Sonnet 5.5 system prompts, entry of October 7, 2026 (Claude Platform Docs, verified 2026-10-16)" - id: openai-characteristics resource: https://help.openai.com/en/articles/20001038-characteristics-in-chatgpt title: "Characteristics in ChatGPT (OpenAI Help Center, updated 2026-08-30, verified 2026-10-16)" - id: openai-intelligent-ui resource: https://help.openai.com/en/articles/20001598-intelligent-ui-in-chatgpt title: "Intelligent UI in ChatGPT (OpenAI Help Center, updated 2026-10-08, verified 2026-10-16)" - id: anthropic-visuals resource: https://support.claude.com/en/articles/13979539-custom-visuals-in-chat-and-cowork title: "Custom visuals in chat and Cowork (Claude Help Center, updated 2026-04-22, verified 2026-10-16)" - id: openai-blocks resource: https://help.openai.com/en/articles/20001246-working-with-writing-blocks-and-code-blocks-in-chatgpt title: "Working with writing blocks and code blocks in ChatGPT (OpenAI Help Center, updated 2026-10-06, verified 2026-10-16)" - id: anthropic-docs resource: https://support.claude.com/en/articles/16923645-get-started-with-claude-docs title: "Get started with Claude Docs (Claude Help Center, updated 2026-10-08, verified 2026-10-16)" - id: anthropic-artifacts resource: https://support.claude.com/en/articles/17153992-what-are-artifacts-and-how-do-i-use-them title: "What are artifacts and how do I use them? (Claude Help Center, updated 2026-10-08, verified 2026-10-16)" - id: openai-deep-research resource: https://help.openai.com/en/articles/10500283-deep-research-in-chatgpt title: "Deep research in ChatGPT (OpenAI Help Center, updated 2026-09-21, verified 2026-10-16)" generated: at: 2026-10-17T01:47:35Z by: process:panaversity trust_tier: unverified build_id: sha256:e1fbcb7d9a8f8b9b7cb96875022325c02c9ba4be94cef13b301cbd39a9edad85 dirty: true ksor_version: 0.0.60 --- **In everyday life.** Two phones show the same text message in different fonts and bubbles. The words are the same on both. Each phone shows them in its own way. **What you will learn.** How each AI vendor shows the marks, keeps a page and makes a web page. Which differences change what you do. **Why it matters.** The marks are the same on both AI vendors. The buttons and settings around them have different names and places, and they change often. So this page shows the date it was checked. > **Anthropic, as verified 16 October 2026.** > > *How replies are formatted.* You can ask for more formatting or less. Anthropic publishes the instructions its apps give each model, and Sonnet 5.5 is a model on the Free plan.[^anthropic-pricing] Its instructions say it may use bullet points and markdown when they make a reply easier to read. It answers simple questions in plain sentences. When you ask for less formatting, it stops using headings, lists and bold. Formatting preferences go in your user preferences.[^anthropic-sonnet-prompt] > > *A page you keep.* Ask for a Claude Doc, in plain words or with /docs. Docs are on every plan. You can export a Doc as Markdown (.md), Word, PDF or Google Docs.[^anthropic-docs] > > *A web page.* Claude builds it as an Artifact, an output kept on its own, beside the chat, and keeps it in the Artifacts tab.[^anthropic-artifacts] > > *Pieces that are not text.* Custom visuals, in beta, which means still being tested, for every user on the web and desktop apps: diagrams, charts and interactive visuals built inside the reply. A visual is not saved unless you copy it as an image, download it or save it as an Artifact.[^anthropic-visuals] > **OpenAI, as verified 16 October 2026.** > > *How replies are formatted.* In Personalization, a setting called Headers & Lists lets you choose "Use more markdown" or "Use less markdown".[^openai-characteristics] On the web, Personalization > Layout and Visuals > Simple reduces visual and interactive pieces, but some may still appear.[^openai-intelligent-ui] > > *Seeing the marks.* Ask for the page in a code block. You can copy a code block's text, marks included.[^openai-blocks] > > *A page you keep.* Copy the code block, and save the text in a plain text file whose name ends in `.md`. A writing block, an editable draft inside a reply, can be copied, or saved to Library, where ChatGPT keeps your files, when that is available.[^openai-blocks] You can download a deep research report as Markdown, Word or PDF.[^openai-deep-research] > > *A web page.* Ask for an HTML page. HTML is the code that web pages are written in. The page comes in a code block, with a Preview.[^openai-blocks] > > *Pieces that are not text.* With Intelligent UI, GPT-6 builds replies from text, visuals and interactive pieces, such as buttons, forms and charts, on free and paid plans. It still gives plain text when that is most useful.[^openai-intelligent-ui] **What neither AI vendor's help pages say**, as verified 16 October 2026: whether the copy button under a reply copies the finished page, the marks or plain text. Look at what you pasted. **The differences that change a step.** Two matter when you keep or share a page. 1. **Where the web page opens.** On Claude, it is an Artifact beside the chat. On ChatGPT, it is HTML in a code block, and its Preview shows the page. So you open the Artifact on Claude and the Preview on ChatGPT. 2. **How the page becomes a file.** On Claude, a Doc can be exported as Markdown (.md). On ChatGPT, you copy a code block into a plain text file. Lab 0.3 copies the code block on both, so you save the file the same way on each. **The invariant.** The buttons will move, and the names will change. The marks stay the same, so a page you keep has the same shape on either AI vendor, and in any app that reads plain text. [^anthropic-sonnet-prompt]: Claude Sonnet 5.5 system prompts, Claude Platform Docs. [^anthropic-docs]: Get started with Claude Docs, Claude Help Center. [^anthropic-artifacts]: What are artifacts and how do I use them?, Claude Help Center. [^anthropic-visuals]: Custom visuals in chat and Cowork, Claude Help Center. [^openai-characteristics]: Characteristics in ChatGPT, OpenAI Help Center. [^openai-intelligent-ui]: Intelligent UI in ChatGPT, OpenAI Help Center. [^openai-blocks]: Working with writing blocks and code blocks in ChatGPT, OpenAI Help Center. [^openai-deep-research]: Deep research in ChatGPT, OpenAI Help Center. [^anthropic-pricing]: Plans & pricing, Claude.