Tech 24 - August 4, 2026

Energy • Yesterday

Valar Atomics raises $1 billion to power AI with nuclear

Valar Atomics just raised $1 billion. Sequoia led the round. The deal values the startup at $6 billion.

Valar builds small nuclear reactors inside a factory. It ships them like equipment. Each one can feed a data center without straining the local grid.

The timing matters. AI data centers are starving for power. Last month Valar's Ward 250 reactor powered an Nvidia chip live on stage. That was a first for an American advanced reactor.

Now Valar and Nvidia are planning a 30-megawatt plant in the desert. It would use zero local water. If it works, nuclear stops being AI's problem and starts being its answer.

Artificial Intelligence • Yesterday

Microsoft's new voice model talks and listens at once

Microsoft is testing a new voice model called MAI-Realtime. It surfaced in the company's internal playground this week.

Most assistants take turns. You talk, then they talk. MAI-Realtime does both at once. It listens while it speaks, so the chat feels human.

The model runs web search mid-conversation. Two voices are live so far, Victoria and Grant. Microsoft hasn't set a date, but it clearly wants its own voice, not OpenAI's.

AI & Law • 2 days ago

Europe now forces chatbots to admit they're bots

New rules took effect across Europe on Sunday. Chatbots must now tell you they are AI. Deepfakes must be labeled.

This is Article 50 of the EU AI Act. It reaches any company that serves EU users. Most large US firms have to comply too.

The penalties bite. Fines can hit 15 million euros or 3 percent of global revenue. For anyone building AI products, disclosure is now the price of doing business in Europe.

Semiconductors • Yesterday

A London startup raised $312 million to move data with light

OLIX Computing raised about $312 million. Arm and Reed Hastings joined the round. It values the chip startup near $3.3 billion.

OLIX builds inference chips that move data with light instead of copper. Light is faster and burns less power. That could ease the memory bottleneck choking big AI models.

The company aims to ship chips by late 2027. If photonics works at scale, Nvidia gets a real rival, and AI compute gets cheaper to run.

Cybersecurity • Yesterday

Horizon3 raised $250 million to hack you before hackers do

Horizon3.ai raised $250 million. NEA led the round. The deal more than tripled the company's value, past $2 billion.

Horizon3 runs autonomous penetration tests. Its software attacks your network the way a hacker would, then shows you the holes. No waiting for a yearly audit.

The demand is real. Horizon3 has 7,200 customers. About half of US federal agencies use it. As AI makes attacks cheaper, constant testing stops being optional.

Biotech • Yesterday

China's biggest brain-interface seed round just closed

Shanghai's Active Technology raised about $46 million. It's the largest angel round ever for a Chinese brain-computer startup. Lenovo's fund joined in.

Active builds non-invasive devices that read brain activity. The goal is to let people control software with thought alone. No surgery required.

Neuralink gets the headlines, but it drills into skulls. Active is betting the mass market wants something you can wear. The money says investors agree.

Space • This week

A two-armed robot is chasing down old satellites

Watch a Falcon 9 carry a repair robot into orbit. Northrop Grumman's Mission Robotic Vehicle has two arms and one job. It grabs aging satellites and gives them fresh jetpacks.

Dead satellites become space junk. This robot keeps them alive instead. It's a step toward fixing hardware in orbit rather than replacing it.