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Anthropic Pulls OpenAI’s Access to Claude — Here's Why

AUG 3 – Anthropic alleges OpenAI breached terms by using Claude's coding tools to develop GPT-5, leading to API access revocation amid rising competition in AI model development.

  • On Tuesday, Anthropic revoked OpenAI’s access to its Claude API models after citing a terms-of-service breach.
  • Using its commercial terms, Anthropic alleges OpenAI used Claude API to test and benchmark models ahead of GPT-5, violating those terms.
  • Ahead of the revocation, new weekly rate limits on Claude Code were set for policy violations, and Anthropic spokesperson Christopher Nulty noted `Claude Code has become the go-to choice for coders everywhere`.
  • OpenAI’s chief communications officer Hannah Wong said, `While we respect Anthropic’s decision to cut off our API access, it’s disappointing considering our API remains available to them` and emphasized the need for benchmarking for safety.
  • As GPT-5 nears release, Anthropic revokes OpenAI’s API access to Claude, reflecting strategic containment amid rising competition.
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India Today broke the news in India on Sunday, August 3, 2025.
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