Jack Marks

LinkedIn · Substack

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Writings from my Substack

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Startup Research

Written:August 2026

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Industry Focus: AI Infrastructure, Model Aggregation, Marketplaces, Developer Tooling

Status: Acquired by Stripe in August 2026 for $7.5 billion

Investors: CapitalG, Menlo Ventures, Andreessen Horowitz, Sequoia Capital

Piece Overview:

  • ChatGPT, LLaMa, and Alpaca as insight that led to the creation of OpenRouter
  • Model usage data dashboards as an unexpected driver of demand side virality within developer communities
  • Why more models meant more headache for developers, and how OpenRouter solved this
  • Factors driving explosive inference consumption growth
  • Incentives for frontier labs to list on OpenRouter
  • Reinforcing network effects that simultaneously scaled model selection by the hundreds, user count by the millions, and token spend by the hundreds of millions
Written:May 2026

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Written:February 2025

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Written:February 2025

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Written:October 2024

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Written:November 2024

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Written:October 2024

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