[OpenAI and Anthropic Cross-Test Models for Hallucination and Safety Issues] According to a report by Jinse Finance, OpenAI and Anthropic recently evaluated each other's models in an effort to identify issues that may have been overlooked during their own testing. The two companies stated on their respective blogs on Wednesday that this summer, they conducted safety tests on each other's publicly available AI models and examined whether the models exhibited tendencies for hallucination or issues of so-called 'misalignment,' where the models do not operate as intended by their developers. These evaluations were completed before OpenAI's release of GPT-5 and Anthropic's launch of Opus 4.1 in early August. Anthropic was founded by former OpenAI employees.