Building a business entirely on a closed-source API from a major provider like Anthropic or OpenAI is precarious. These platform companies can and do release new capabilities that directly compete with and subsume the functionalities of startups in their ecosystem, effectively erasing their business overnight.

AI model providers like Anthropic analyze usage data from customers to identify lucrative verticals, then launch competing applications (e.g., Claude Design vs. Figma). This commoditizes their partners, posing an existential risk for developers building on these platforms.

Startups building on OpenAI or Anthropic APIs face a major platform risk. Their usage data trains the underlying foundational models, enabling the platform owners to eventually absorb their features natively and make the startups obsolete.

Data reveals an extreme power law where model labs OpenAI and Anthropic capture nearly all AI startup revenue, and their share is growing. This indicates value is accruing to the foundational layer, posing an existential threat to the long-term viability of application-focused startups.

To avoid having their core inference services commoditized, frontier labs like OpenAI and Anthropic will inevitably move up the stack. They will build applications that compete directly with their largest customers, such as those in legal tech or design, posing an existential risk for any startup building on their platform.

Startups building on proprietary AI platforms like Anthropic or OpenAI face significant risk. The platform can analyze token usage, identify successful applications, and then launch a competing, integrated feature, as Anthropic did to its partner Cursor with Claude Code.

Gurley notes that major AI model providers like OpenAI and Anthropic are shifting from solely selling API access to building their own applications. This move up the stack signals a fear that being a pure model provider is not a defensible moat and could lead to commoditization.

When AI companies like OpenAI and Anthropic compete with customers, it's a defensive strategy driven by the commoditization and price collapse of their core product (tokens). They are desperately searching for higher-margin revenue streams as their fundamental business model erodes.

A true platform enables its users to generate more revenue than the platform itself captures. AI companies like Anthropic are currently failing this test, as their revenue from token sales far exceeds the revenue generated by the startups building on them, creating an unsustainable circular economy.