Anthropic blocks OpenAI from using its Claude model, citing terms of service violations tied to GPT-5 development.

Anthropic, the company behind Claude AI, recently made a bold decision. The company has revoked OpenAI’s API access to its models, accusing the company of violating its terms of service.

OpenAI lost access to the Claude API this week after Anthropic claimed the company was violating its terms of service.

Anthropic has revoked OpenAI’s access to its Claude AI models, citing policy violations related to GPT-5 testing. Anthropic ...

Anthropic has claimed that members of OpenAI’s technical staff interacted with Claude Code in ways that violated its terms of ...

Anthropic has revoked OpenAI’s access to its Claude AI models for violating its terms of service. Sources familiar with the ...

As reported by Wired, multiple sources claim that OpenAI has been cut off from Anthropic’s APIs. Allegedly, OpenAI was using ...

As OpenAI is set to launch its next-gen AI model, Anthropic claims GPT 5 is based on its Claude models. Anthropic has ...

Anthropic found that pushing AI to "evil" traits during training can help prevent bad behavior later — like giving it a ...

Anthropic has cut off one of its biggest competitors, revoking OpenAI’s access to its Claude family of AI models.

Anthropic cut off OpenAI’s ability to use its API for Anthropic models on Tuesday. The move followed Anthropic’s finding that ...

Anthropic has reframed its OpenAI API block, clarifying it will still permit access for safety and benchmarking while barring ...