An OpenAI spokesperson said the API access allowed for industry-standard benchmarking and safety improvements.

OpenAI was connecting Claude to internal tools that allowed the company to compare Claude’s performance to its own models in categories like coding, writing, and safety.

Anthropic has officially stopped OpenAI from using its Claude models. This decision came after reports revealed that OpenAI had been using Claude in ways that Anthropic says broke the rules. According to a report by Wired, OpenAI had connected Claude to some of its internal tools.