NotebookLM が「Gemini Notebook」に名称変更NotebookLM is now Gemini Notebook

Google has renamed NotebookLM, its AI-powered research and note-taking application, to Gemini Notebook, folding the product more explicitly into the company's flagship Gemini brand. According to Google's Keyword blog, the change is primarily a matter of naming and identity rather than a wholesale reinvention of the tool, but it reflects how deliberately the company is working to unify its sprawling collection of AI features under a single, recognizable label.

NotebookLM launched in 2023 as an experimental product designed to help users reason over their own documents. Rather than pulling answers from the open web, the tool grounds its responses in sources that a user uploads or links, such as PDFs, Google Docs, slides, and web pages. This source-grounded approach was intended to reduce the risk of fabricated answers and to make it easier to trace a claim back to a specific passage. The application later gained wider attention for its Audio Overviews feature, which generates a conversational, podcast-style summary in which two synthetic hosts discuss the uploaded material. That capability helped push NotebookLM beyond a niche research utility toward broader consumer use.

The rebrand to Gemini Notebook places the product alongside the rest of Google's Gemini-branded lineup. The name Gemini refers both to Google's family of large language models and to the assistant that replaced Bard in 2024. Since then, Google has steadily retired older brand names in favor of the Gemini label. The Duet AI features in Google Workspace, for example, were folded into Gemini, and the assistant now spans the Gemini app, Chrome, Android, and various Workspace tools. Bringing NotebookLM into that structure appears to be a continuation of the same consolidation strategy rather than an isolated decision.

For existing users, a rename of this kind is typically low-friction, though some disruption is possible. Product URLs, app names, and in-product references usually change, and users may need to adjust bookmarks or internal documentation. Google has said the move is meant to offer a more consistent experience across its AI tools, and it is likely that the underlying functionality, including source grounding and Audio Overviews, will continue largely unchanged in the near term. Whether the rebrand will be accompanied by deeper integration, such as shared context between Gemini Notebook and the main Gemini assistant, is not fully detailed and remains to be seen.

There is a clear strategic logic to the consolidation. Maintaining multiple distinct brand names for overlapping AI products can confuse users and dilute marketing efforts, particularly as competitors present their assistants under unified banners. OpenAI markets its tools primarily under the ChatGPT name, Microsoft has grouped many of its AI features under Copilot, and Anthropic centers its consumer and developer offerings on Claude. By narrowing its own branding to Gemini, Google appears to be trying to make its AI ecosystem easier to understand and to reinforce the association between its models and the products built on top of them.

The move also underscores how central document-grounded AI has become to Google's roadmap. Tools that let people query their own files, rather than the entire internet, address a persistent concern about accuracy and provenance in generative systems. Grounding responses in user-provided material does not eliminate errors, but it gives people a way to verify output against known sources, which is valuable in research, study, and enterprise settings. Positioning this capability under the Gemini brand suggests Google views it as a durable part of its offering rather than an experiment.

It is worth treating some of the finer points with caution until Google publishes fuller documentation. Rebrandings of this scale sometimes arrive in stages, with regional rollouts, pricing adjustments, or feature changes following the initial announcement. Users on free and paid tiers, as well as Workspace and education customers, may see the transition at different times. For now, the most concrete takeaway is that NotebookLM's distinct identity is being absorbed into Gemini, and that Google is continuing to streamline how it names and presents the growing family of products powered by its models.