ANTHROPIC SAYS OPENAI ENGINEERS USING CLAUDE CODE AHEAD OF GPT-5 LAUNCH

Summary from the TLDR InfoSec newsletter

Anthropic revoked OpenAI's access to the Claude API after discovering ChatGPT engineers were using Claude Code tools ahead of GPT-5's expected launch next week. The incident highlights competitive tensions in AI development, with Anthropic's spokesperson noting that Claude Code has become the “go-to choice for coders everywhere,” including OpenAI's technical staff. Whether OpenAI used Claude Code to enhance GPT-5's coding capabilities remains unclear, but the timing suggests potential competitive intelligence gathering.