Save ChatGPT, Claude or Gemini chats to NotebookLM

Why save a chat as a source

• A good ChatGPT or Claude session is research you did once. In a notebook it sits next to the papers, pages and videos on the same topic, and the answers cite it.
• Gemini Notebook answers only from your sources, so a saved chat is checkable: every claim links back to the exact passage.
• Each chat is one source. A source holds up to 500,000 words, so length isn't the problem; the number of sources is (50 per notebook on Google's free plan). Limits by plan

Copy and paste (works for every assistant)

1. In the chat, select the whole conversation and copy it. In ChatGPT and Claude, dragging from the first message to the last selects both sides.
2. In Gemini Notebook, open the notebook, click Add sources and choose Copied text.
3. Paste, give the source a title you'll recognize later (the question you asked works well) and click Insert.

Copied text, websites, PDFs, Google Docs and YouTube links are all on Google's list of source types: Add or discover new sources for your notebook, read October 22, 2026. The paste loses the chat's formatting of code blocks and tables in places, so for code-heavy chats the share link below is cleaner.

Add the share link as a website source

1. Create a public link to the conversation (each assistant's steps are below).
2. In Gemini Notebook, click Add sources, choose Website and paste the link.
3. Gemini Notebook fetches the page and makes it a source. If the source comes in empty or short, the share page needed a sign-in or loaded its text with scripts; fall back to copy and paste.

• ChatGPT: the Share button at the top of the conversation makes a public link. Anyone with the link can read the chat, so don't share chats with private data this way.
• Claude: click Share in the upper right, then Share again to create the link. It's a snapshot; later messages are added only when you click Update in the Share menu. Set it back to Private when you're done.
• Gemini: Google lists Gemini chats among Gemini Notebook's own source types, so look in Add sources first. Gemini can also export a response to Google Docs, and a Doc added from Drive stays in sync when you edit it.
• Perplexity and Grok: both have a Share button that makes a public link to the thread; paste it as a website source, or copy the text.

Claude's sharing steps are from Anthropic's help article on sharing chats; Gemini's source types from Google's help center; both read October 22, 2026.

One click with KastorFlow

1. Install KastorFlow and open the conversation in ChatGPT, Claude, Gemini, Perplexity or Grok.
2. Click Save to NotebookLM, the button KastorFlow adds to the chat page.
3. Pick a notebook, or create a new one. The whole conversation, both sides, is added as one source with the chat's title.

• No public link is created and nothing leaves the chat page until you click. KastorFlow reads the conversation only when you press the button.
• Saved chats show up in KastorFlow's library with every other source, so you can tag them (for example chatgpt, claude) and search across them later. Organizing tools
• Free: 5 chat saves a day. Pro: no daily limit. Plans

Make the saved chat useful

• One topic per source. A chat that wandered across three subjects is harder to cite. Save the useful stretch, or split it into two sources.
• Title it with the question. Gemini Notebook shows source titles in citations and in the Studio panel.
• Ask for the check. Once the chat is a source, ask the notebook "which claims in this conversation aren't supported by my other sources?" That's the point of moving it out of the chat window.
• Re-save when it moves on. A saved chat is a snapshot; nothing syncs back from ChatGPT or Claude.

Which route to use

Questions