Simon Willison argues that Anthropic and OpenAI have achieved product-market fit, as evidenced by their recent pricing changes and increased enterprise customer spending on AI tools. These developments suggest a significant shift towards revenue generation from enterprise solutions, particularly coding agents, which are quickly becoming essential for skilled knowledge workers.
In April 2026, both Anthropic and OpenAI shifted their enterprise pricing models to align with API token usage, signaling a strong product-market fit for their coding agents like Claude Code and Codex. This change reflects a strategic pivot to capitalize on enterprise customers who are willing to pay significantly more per user, thus accelerating revenue growth. For professionals interested in AI dev tools and productivity, this underscores the importance of understanding and leveraging enterprise pricing structures as these tools become indispensable in high-value workflows.