Claude 4 launched approximately 3-4 months ago.

Study reveals GPT-5 exhibits central tendency bias in clinical scoring, compressing predictions toward scale midpoint.

Showed 87% hyper-truth rate in neutrosophic logic evaluation study.

Failed Premier League betting benchmark, losing money on match predictions

Claude 2 was used in an experiment that found AI-generated fact-checks are rated more helpful and less ideological than human ones.

Evaluation study published on arXiv assessing its clinical reasoning capabilities

Reportedly became available according to user social media post