GoKawiilThiel Fellow Sigil Wen launches on-device AI assistant Underdog in invite-only beta
Sigil Wen, a Thiel Fellow and former teenage hacker-house resident among early AI luminaries, has released an invite-only beta of Underdog, an AI assistant that runs entirely on a user's own device rather than in the cloud. Wen built a companion inference engine called Husky to run the models efficiently on Macs and Windows PCs, with Linux, iPhone and Android support planned. The assistant uses a 27-billion parameter model fine-tuned from Qwen3.8 27B and encrypts credentials for accounts it's authorized to access.
GoKawiil's interpretation of the reporting above, not reported fact.
By keeping data and processing entirely on-device, Underdog positions itself as a more private alternative to assistants like Instinct and Muse that rely on cloud-hosted models, which could appeal to privacy-conscious users and enterprises. Wen's claim that a much smaller model rivals Claude Opus 4.6 on some benchmarks, if borne out broadly, would suggest efficient on-device inference engines like Husky could narrow the gap with massive data-center models. The invite-only beta stage means real-world performance and adoption remain untested at scale.
- Underdog runs fully on-device, keeping user data off cloud servers.
- It pairs with Wen's own inference engine, Husky, designed for faster on-device model execution.
- Wen claims a 27B-parameter model rivals Claude Opus 4.6 on some benchmarks, though it's far smaller than state-of-the-art cloud models.
Source: techcrunch.com — Julie Bort, 2026-10-06
Published there as: “Silicon Valley’s AI wunderkind launches Underdog, the most private Instinct/Muse competitor yet”
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