Bitcoin Red Team has now found 1,288 critical and high-level vulnerabilities in the Bitcoin ecosystem as of Saturday. A Bitcoin security researcher says he has been forced to go back to using open-source Chinese AI models after finding himself restricted from analyzing further codebases by OpenAI, highlighting a growing concern that the most capable AI tools aren’t being made available to defenders. In an X post on Tuesday, AnchorWatch CEO Rob Hamilton said he had begun integrating OpenAI’s Trust & Cyber capabilities into his Bitcoin Red Team work on Saturday, only to find his access restricted the following morning. Bitcoin Red Team, a group of volunteers, has been using AI tools and human review to scan hundreds of open-source Bitcoin-related repositories for vulnerabilities, with efforts accelerating days after the Coldcard hardware wallet hack, which has seen over $100 million in Bitcoin stolen. Related: Crypto firms still seeking frontier AI access; only select few have it