Mountain View, CA – May 3, 2025 – Google has officially confirmed that its AI-powered tool NotebookLM is now running on Gemini 2.5 Flash, the latest experimental version of its language model. This upgrade marks a significant improvement in the tool’s ability to handle complex, multi-step reasoning tasks and deliver more comprehensive answers, especially in research and academic use cases.
NotebookLM Evolves with Gemini 2.5 Flash Integration
Initially running on Gemini 2.0 Flash, NotebookLM now leverages the enhanced capabilities of Gemini 2.5 Flash, which Google describes as having more advanced “thinking” capabilities. Users can expect richer, more accurate responses when asking layered or technical queries, benefiting students, professionals, and content creators who rely on the tool for in-depth note analysis and summarization.
Audio Overviews and Language Expansion Enabled by Gemini
Earlier this week, Google also introduced Audio Overviews in over 50 languages for NotebookLM, powered by Gemini’s native audio capabilities. This enhancement allows users to listen to summarized content in their preferred language, broadening accessibility and multilingual support globally.
Gemini 2.5 Flash in Preview for Developers
Google also noted that Gemini 2.5 Flash (preview) — currently identified as gemini-2.5-flash-preview-04-17 — is available to third-party developers. This model is still in preview but is expected to become generally available for full production once stability and performance benchmarks are met.
In parallel, Google hinted that Gemini 2.5 Flash will eventually replace 2.0 Flash as the default base model, aligning with its broader plan to phase out older models and streamline access to more advanced AI capabilities.
What This Means for Users
With NotebookLM now underpinned by Gemini 2.5 Flash, users can anticipate:
Improved comprehension of long documents
Faster and more contextual summaries
Support for intricate Q&A tasks
Multilingual audio support
These changes signal Google’s commitment to transforming NotebookLM into a smarter, more intuitive AI assistant for knowledge work.
Bhupendra Singh Chundawat is a seasoned technology journalist with over 22 years of experience in the media industry. He specializes in covering the global technology landscape, with a deep focus on manufacturing trends and the geopolitical impact on tech companies. Currently serving as the Editor at Udaipur Kiran, his insights are shaped by decades of hands-on reporting and editorial leadership in the fast-evolving world of technology.
