Google's Agentic Leap: Gemini 3.5, NotebookLM, and the Rise of Gemini Spark
Google is doubling down on the concept of "Agentic AI" with a sweeping series of updates to its AI ecosystem in June 2026. The centerpiece of this evolution is the massive upgrade to NotebookLM and the general availability of the Gemini 3.5 model family, effectively turning the AI from a passive chatbot into a proactive research partner.
NotebookLM: From Note-Taker to Autonomous Researcher
The new NotebookLM, now powered by Gemini 3.5 and the Antigravity code editor, represents a fundamental shift in how researchers interact with data. The most significant addition is the integration of a secure cloud computer for every notebook. This allows NotebookLM to not just summarize text, but to write and execute code in real-time to perform deep data analysis, generate complex visualizations, and verify mathematical hypotheses.
Beyond coding, the platform has expanded its output capabilities. Users can now generate and export artifacts in a variety of formats, including SVG and PNG visualizations, structured JSON/CSV data, and professional documents in PDF and DOCX formats. The system now assists users from the very beginning of the research process, helping to discover and curate high-quality web sources through an integrated Google Search experience with strict attribution.
The Gemini 3.5 Model Family
Parallel to the NotebookLM upgrades, Google has deployed the Gemini 3.5 family, designed to balance extreme speed with deep reasoning capabilities.
- Gemini 3.5 Flash: Optimized for agentic workflows and coding, this model is now the default engine for the Gemini app and Google Search AI Mode. It is designed for low-latency, high-throughput tasks that require sustained performance. - Gemini 3.5 Pro: Slated for a June 2026 general release, the Pro tier introduces a massive 2-million-token context window and a specialized "Deep Think" reasoning mode, allowing it to process entire codebases or long-form legal documents in a single pass.
The Rise of the 24/7 AI Agent
Perhaps the most ambitious project is Gemini Spark, a 24/7 personal AI agent. Powered by Gemini 3.5 Flash, Spark is designed to integrate deeply with Google Workspace to execute multi-step workflows autonomously. Whether it's managing a complex calendar, organizing cross-platform research, or coordinating emails, Spark moves the AI from a "prompt-and-response" tool to a persistent digital employee.
Complementing this is Gemini Omni, a multimodal powerhouse capable of creating dynamic video content from text and audio. Rolling out via Gemini Omni Flash, this technology is being integrated into YouTube Shorts, enabling a new era of AI-generated short-form content.
Impact on the Future of Work
The synergy between Gemini 3.5, NotebookLM, and Gemini Spark suggests a future where the "blank page" problem is solved. By combining autonomous code execution, massive context windows, and proactive agentic behavior, Google is attempting to capture the "AI OS" market—creating a seamless layer of intelligence that sits across all digital activities.
For power users and enterprises, these tools reduce the friction between an idea and a finished product, making high-level research and complex data analysis accessible to anyone with a prompt.