Anthropic Restricts OpenAI Access to Claude Models

Anthropic Restricts OpenAI's Access to Claude AI Models

Recent reports indicate that Anthropic has terminated OpenAI’s ability to utilize its Claude series of artificial intelligence models, as detailed in a Wired publication.

Information obtained by Wired suggests that OpenAI was integrating Claude with internal systems. This integration facilitated a comparative analysis of Claude’s capabilities against OpenAI’s own models.

Violation of Terms of Service

According to a statement released to TechCrunch by an Anthropic representative, OpenAI personnel were utilizing Anthropic’s coding resources prior to the anticipated release of GPT-5.

This activity is considered a breach of Anthropic’s service agreements, which explicitly prohibit the use of Claude for the development of rival services.

Continued Access for Specific Purposes

Despite the revocation, Anthropic indicated a willingness to maintain OpenAI’s access for specific applications.

These permitted uses include benchmarking and safety evaluations, ensuring ongoing assessment of AI model performance and security.

OpenAI's Response

In response, an OpenAI spokesperson characterized their usage as a common practice within the industry.

They expressed disappointment with Anthropic’s decision to restrict API access, particularly given that OpenAI’s API remains accessible to Anthropic.

Prior Restrictions on Competitors

Anthropic has previously demonstrated reluctance to grant access to competing organizations.

Jared Kaplan, Anthropic’s Chief Science Officer, previously explained the decision to limit access for Windsurf – a company later acquired by Cognition – stating it would be unusual to provide Claude to OpenAI.

Key Points of the Situation

• Anthropic has revoked OpenAI’s access to the Claude AI model family.
• The action stems from OpenAI’s use of Claude for competitive analysis and potential development of competing services.
• Access will be maintained for benchmarking and safety evaluations.
• OpenAI views its usage as standard industry practice.