Sabi raises a $50M seed led by Khosla Ventures for a non-invasive ‘brain-AI interface’ baseball cap that turns imagined speech into prompts
Partly confirmed
The takeaway
On Oct 9, 2026 Sabi announced a $50M seed round led by Khosla Ventures for a baseball cap with up to ~100K non-contact neural sensors.
Status
- Claim
Partly confirmed
- Our reporting
- Medium confidence
- Importance
- 2 of 5
- Last verified
- 9 October 2026
Your AI and this story
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None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 101 days before it.
Key facts
- Seed: $50M led by Khosla Ventures; Accel, Initialized Capital, DST Global, Collaborative Fund, Ascend and Kevin Weil (former OpenAI CPO) participated (company press release, Oct 9, 2026)
- Hardware: custom EEG chip; sensors of 1–5 mm read signals through hair without gel or surgery; Sabi claims 50x the power efficiency of TI’s ADS1299; Forbes/Techmeme: 100K non-contact neuro-sensors
- Data and model: 100,000+ hours of labeled neural recordings (from about 100 volunteers, per earlier coverage), which Sabi calls the largest disclosed dataset of its kind, used to train a ‘brain foundation model’
- Functions: imagined speech-to-text, thought-to-prompt AI commands, and prediction of keystrokes and on-screen actions; ~30 words per minute targeted (earlier coverage)
- Founders: CEO Rahul Chhabra; CTO Atmadeep Banerjee (co-first author of MindEye, NeurIPS 2023). Sabi came out of stealth in April 2026 with a ‘beanie’ form factor
- Vinod Khosla: ‘You cannot perform a billion brain surgeries to replace a billion keyboards.’ Prototype demo planned for CES 2027
What happened
Sabi, a California neurotech startup, raised a $50 million seed round to build a wearable, non-invasive brain-computer interface for everyday AI use. The device is a cap with dense dry EEG-style sensors. Its brain foundation model is trained on a large proprietary set of neural recordings and aims to turn imagined speech into text and commands for AI assistants. The company has not published accuracy or speed results for independent review.
Why it matters
As AI assistants become the main interface to computers, investors are backing non-surgical “thought-to-prompt” input. Whether scalp EEG can carry enough signal for real imagined-speech decoding is still an open scientific question.
Sources
4 sources from 4 sites. Numbers match the chips in the text.
4 sources: 1 primary, 3 press
Primary
- Sabi press release: $50M seed led by Khosla Ventures to put a brain-AI interface inside a baseball cappinionnewswire.com, official
Press
- Forbes: Vinod Khosla backs an AI startup building a mind-reading baseball capforbes.com, press
- TestingCatalog: How Sabi’s brain-reading cap turns thoughts into texttestingcatalog.com, press
- Boing Boing: A Silicon Valley startup wants to sell you a brain-reading beanie (April 2026)boingboing.net, press
Changes
- Filed