Anthropic revoked OpenAI's access to its Claude AI models over claims of OpenAI using Claude's performance for internal comparisons. Anthropic cited a violation of its terms, as OpenAI's staff utilized Claude's tools before the GPT-5 launch. Anthropic forbids the use of its models for building competing services. An OpenAI representative expressed disappointment at the loss of access while noting their API remains available to Anthropic, highlighting ongoing tensions in their relationship and Anthropic's previous resistance to providing access to competitors.
OpenAI's own technical staff were also using our coding tools ahead of the launch of GPT-5, which is apparently a direct violation of our terms of service.
OpenAI’s API remains available to them, which makes the decision to cut off API access disappointing.
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