Amazon starts previewing a video model reverse-engineered from rat neurons

What arrives in a customer's account is a model. The rat cells sit on multi-electrode silicon arrays made by the Swiss firm 3Brain, where TBC researchers send in electrical stimulation patterns and record how the neurons respond ^[14]. The company then looks through that activity for computational patterns it can turn into software and apply to existing video generation models ^[15]. Cofounder Alexander Ksendzovsky described the loop to Wired: "We figured out a way to code information, like images for example, to the biological material," he said, and "We then observe how the biology processes that information, and then we build a tool that mimics that process." ^[4][5]

The biology, then, sits upstream of the product. No living cells run in the buyer's inference path ^[1]. Anyone filling in a vendor questionnaire on Monday can handle it the way they handle any other weights-and-API purchase.

It also separates TBC from the other biology vendor in Amazon's catalog. Deap Ubhi, AWS's global director of technology for startups, said TBC is not the first biologically derived computing platform Amazon has made available in its marketplace, and that AWS also works with Cortical Labs, an Australian company that combines lab-grown neurons with silicon chips and sells the result as "wetware as a service" ^[6][7]. Cortical Labs also sells a multi-thousand-dollar low-power "biological computer" for laboratory use that can supposedly keep neurons alive for six months ^[8].

The pitch is efficiency. Ubhi said of TBC that "they're working within existing standards of the generative AI space and saying, 'How can we make the current visual models more efficient?'" ^[9]. Wired's account carries no price for the preview and no measured efficiency comparison ^[20].

TBC raised $25 million earlier this year in a round led by Primary Venture Partners, then secured another $25 million shortly after that round closed in March, taking its total above $50 million ^[11][12]. The San Francisco office and lab it opened last year holds 35 employees working with rat brain cells and human stem cells ^[13]. Divide the funding by that headcount and you get roughly $1.4 million per person in the lab ^[2]. TBC is four years old, founded in Baltimore by two neuroscientists who are also neurosurgeons, Ksendzovsky as CEO and Jon Pomeraniec as president and COO ^[10].

Video came first for a physical reason: electrode placement on the array changes how each electrode interacts with the neurons, and images mapped onto that grid more readily than text or language ^[16]. Pomeraniec said the suggestion to start with fine-tuning video generation models came from Jeff Dean, an AI researcher who is also a TBC investor ^[17].

Two questions sort this for a buying team. First, is the biology in the loop at runtime? Here the answer is no, so the diligence is ordinary: license terms, latency, cost per second of rendered video, who stands behind the output. Second, is the claimed gain measured on your prompts and your hardware, or on the vendor's? In a limited preview, a buyer still has the leverage to insist on the first and refuse the second.

Who this is for: teams already generating video at enough volume that inference cost shows up as a line item, and who have someone willing to run a controlled comparison and write the number down.