AI News: April 28, 2026

1. David Silver’s Ineffable Intelligence Raises $1.1B at $5.1B to Build “Superlearners” That Skip Human Data

Ineffable Intelligence. Former DeepMind reinforcement-learning lead David Silver — best known for AlphaGo and AlphaZero — closed a $1.1B round at a $5.1B valuation for Ineffable Intelligence, a U.K. lab pursuing AI systems that learn primarily through self-play and trial-and-error rather than human-generated data. The round was led by Sequoia and Lightspeed with participation from Google, NVIDIA, Index Ventures and the U.K.’s Sovereign AI fund; Silver pledged to donate any personal profits to high-impact charities. The deal extends the pattern of celebrity-researcher labs (Thinking Machines, Safe Superintelligence) commanding seed-stage rounds the size of late-stage growth deals. Source

2. Signull Labs’ Skye Lines Up Investors for an Agentic iPhone Home Screen

Signull Labs. Skye, an iPhone home-screen app from ex-Google/Meta engineer Nirav Savjani’s Signull Labs, closed a $3.58M pre-seed at a $19.5M post-money valuation with a16z, True Ventures, SV Angel and Offline Ventures, ahead of a public launch from a private waitlist. The app uses iOS widgets to surface ambient agentic features — meeting prep, suspicious-charge alerts, location-aware suggestions, draft email replies — over authorized data connections, betting that the home screen rather than a chat tab is the right surface for personal agents. Source

3. Sereact Raises $110M to Scale Its General-Purpose Robotic Brain

Sereact. Stuttgart-based Sereact raised $110M to scale its language-conditioned robotic policy stack into more warehouses and manufacturing lines. The company sells a general-purpose “robotic brain” that retargets across grippers and arms via vision-language inputs, betting that fleet-level policy improvement, not custom per-cell engineering, is the path to ROI in industrial robotics. Source

4. April 27 Funding Roundup: Fathom Therapeutics, Quantum Art, Comfi

Various. A handful of AI-adjacent rounds closed alongside the Silver and Sereact deals. Fathom Therapeutics raised a $47M oversubscribed Series A led by Sutter Hill Ventures for AI-driven protein modeling for drug discovery; Israel-based Quantum Art extended its Series A by $140M (now $240M total) led by Bedford Ridge Capital; and Dubai fintech Comfi closed a $65M pre-Series A led by Iliad Partners. The mix of biotech, quantum and fintech AI deals reinforces that capital is fanning out beyond foundation-model labs into AI-native verticals. Source