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Return On Token Spend: How Companies Finally Solved the Quantification Problem in Engineering

Posted Oct 29, 2026 | Views 12
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Andrew Churchill
Co-founder & CTO @ Weave

Andrew Churchill is the co-founder and CTO of Weave (YC W25), where he leads the engineering behind an intelligence platform that measures AI's impact on software development, helping teams see what's actually being shipped from prompt to production. Before Weave, Andrew was the first employee at Causal, where he built core systems. Andrew earned his degree in Computer Science and Mathematics from MIT and is based in San Francisco.

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SUMMARY

Engineering has always had a quantification problem: we could measure activity, but never truly connect investment to output. Ironically, AI agents are solving it. Tokens are metered, agent work is traceable end to end, and for the first time the inputs to engineering are as measurable as the outputs. This talk shows how leading companies are turning that visibility into a return-on-token-spend model: which productivity metrics hold up in agentic workflows, which quietly break, and how to tie token consumption to shipped outcomes. You'll leave with a framework you can implement with your existing tooling, and the numbers to answer the ROI question your CFO is already asking.

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CONTENT & TRANSCRIPT


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