# Simon Willison Used Claude Code to Audit Four AI APIs Before Writing a Line of Code

- slug: simon-willison-used-claude-code-to-audit-four-ai-apis-before-writing-a-line-of-code
- date: 2026-04-05
- category: Artificial Intelligence

Anthropic, Google, and OpenAI models now run tools during the reasoning phase before returning a response. That creates a storage problem that every production AI application builder is about to hit. Simon Willison went straight to the raw APIs to solve it.

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