Sakana AI Launches 'Ultra Deep Research' Agent for 100+ Page Reports in 8 Hours

AI Launches 'Ultra Deep Research' Agent for 100+ Page Reports in 8 Hours">

Tokyo-based AI startup Sakana AI has officially launched its first commercial product, Sakana Marlin. Billed as a " Virtual CSO " (Chief Strategy Officer), Marlin is an autonomous, B2B research agent that deliberately abandons the instantaneous text generation of modern chatbots in favor of deep, long-horizon reasoning. What sets Marlin apart from the current ecosystem of AI tools is its temporal scale: instead of returning an answer in seconds, it runs continuous, self-governing reasoning loops for up to eight hours at a time to deliver deeply researched, well cited, 100-page strategy reports and executive slides.

The company posted sample reports generated by Marlin on its product website. Available immediately via the company’s website with pricing starting at a pay-as-you-go tier, the platform is designed strictly for enterprise use—specifically targeting corporations, financial institutions, and think tanks. The generative AI hype cycle has largely been defined by speed.

For the past two years, the industry standard has been the ability to generate a poem, a line of code, or a surface-level summary in mere milliseconds. But the enterprise frontier is rapidly shifting from shallow, rapid generation to deep, methodical reasoning. With Marlin, major businesses are no longer asking how fast an AI can answer, but how deeply it can think.

The Product: A Virtual CSO What exactly is a business getting when they deploy Sakana Marlin? The workflow is fundamentally different from typical large language model (LLM) interactions. Rather than engaging in a tedious back-and-forth prompt engineering session, the user simply provides a core research topic.

Following a brief initial exchange to sharpen the scope and direction of the investigation, the human steps away entirely. For the next several hours, Marlin operates as a self-contained digital strategy team. It formulates its own initial hypotheses, navigates the web to gather data, cross-references sources to verify findings, and maps the causal dynamics within complex business environments.

It is effectively searching for the "winning formula" within a sea of noise. Think of it less like a search engine and more like a junior strategy consultant locked in a room with a whiteboard and an internet connection. The Engine of Long-Horizon Reasoning Under the hood, Marlin is the commercial culmination of Sakana AI’s extensive laboratory breakthroughs over the past two years.

The product is powered by an exploration engine relying on Sakana's own prior research breakthrough, Adaptive Branching Monte Carlo Tree Search (AB-MCTS), and leverages frameworks derived from "The AI Scientist," an earlier Sakana AI research project featured in the journal Nature that successfully automated the scientific discovery process from ideation to peer review. To understand how this works in practice, consider a real-world analogy: modern chess engines. When a computer plays chess, it doesn't just look at the board and guess; it plays out thousands of potential future moves, evaluating the strength of each resulting position before committing to an action.