Anthropic released Claude Fable 5.1 and Claude Mythos 5.1 on September 1, the latest interaction of the model series that is among the most influential, and expensive, model launches in recent memory. Now, with the launch of the two new models, Anthropic is claiming significant jumps in performance on scientific benchmarks. On Terminal-Bench-Science 0.1, an… The post Anthropic doubles a science benchmark score with Fable 5.1 while OpenAI says its Astra models crosses critical cyber threshold appeared first on Research & Development World .