Overview

• The cut follows Anthropic’s commercial terms forbidding use of Claude to train or reverse-engineer competing AI models.
• OpenAI engineers reportedly integrated Claude Code into internal tools to benchmark coding, creative writing, and safety responses ahead of GPT-5’s release.
• Just before revoking OpenAI’s credentials, Anthropic imposed new rate limits on Claude Code to manage surging demand and enforce service rules.
• OpenAI described competitor benchmarking as standard practice but expressed disappointment at the broader API cutoff even as Anthropic retains its access to OpenAI’s API.
• Tech giants have long used API controls as competitive levers, from Facebook’s restriction on Vine to Salesforce’s tightening of Slack data access.