Anthropic Claims OpenAI Engineers Are Utilizing Claude Code Ahead of GPT-5 Release

Anthropic has revoked OpenAI’s access to its Claude API after discovering that OpenAI’s engineers utilized Claude’s coding tools, known for their exceptional performance in the AI coding sector, particularly “Vibe coding.” Claude Code has established itself as the preferred choice for both novice and expert coders, allowing seamless web app development and efficient infrastructure management. This coding tool was integral to Anthropic’s development processes. Following this incident, Anthropic confirmed the revocation of OpenAI’s access, citing the inappropriate use of their tools prior to the anticipated launch of GPT-5. An Anthropic spokesperson emphasized the widespread adoption of Claude Code among coders, including OpenAI’s technical staff. With GPT-5 expected to introduce advanced “auto” and reasoning modes next week, the implications of this access revocation may considerably impact its coding capabilities. For effective security, especially in the face of rising malware threats targeting password stores, staying abreast of MITRE ATT&CK techniques is crucial.

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