Openai

ANTHROPIC REVOKED OPENAI’S API access to its models on Tuesday, multiple sources familiar with the matter tell WIRED. OpenAI was informed that its access was cut off due to violating the terms of service.

“Claude Code has become the go-to choice for coders everywhere, and so it was no surprise to learn OpenAI’s own technical staff were also using our coding tools ahead of the launch of GPT-5,” Anthropic spokesperson Christopher Nulty said in a statement to WIRED. “Unfortunately, this is a direct violation of our terms of service.”

Companies building AI dev tools report positive results. Cursor calls it “the smartest coding model we’ve used.” Windsurf says it has “half the tool calling error rate” of other models. Vercel praises its frontend capabilities.

Beyond the tool companies, some founders and developers have shared their early experiences. GitHub’s CEO mentioned that GPT-5 shows promise for complex refactoring tasks. Several startup founders have noted improvements in code generation quality, though most emphasize they’re still in early testing phases.