💻 Tom Tunguz: 'The Harness' Is Becoming AI's Real Battleground
Tunguz argues the real strategic asset in AI is shifting to the 'harness' - the software layer, like Claude Cowork or Cursor, that mediates between users and models and controls what data gets logged and fed back into training. He cites Satya Nadella and Palantir's Alex Karp both warning in the same week that enterprises 'pay for intelligence twice' - once in dollars, again by surrendering proprietary data - and a July 13 incident where xAI's Grok Build was found uploading developers' codebases even without an AI call, which xAI later disabled. AI training-data startups generating trajectory data now collectively pull in roughly $10 billion in revenue. Tunguz predicts enterprises will increasingly demand zero data retention guarantees from AI vendors, mirroring the trust guarantees SaaS built over 20 years. For fintech and enterprise software investors, harness-layer data governance is emerging as a key moat and a new due-diligence axis for AI vendor selection.
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