According to CoinMeta, Anthropic has begun small-scale testing of the subsequent model Fable 5.1 of Fable. Although some Claude Web users are still choosing Fable 5, the backend may have already switched to the new model. In addition, a AI whistleblower account Leo stated that OpenAI plans to release Astra in the coming weeks and will showcase a practical demonstration of its functionality. The Astra version is mainly focused on correcting model behavior to reduce loopholes in the reward mechanism. Recently, due to security concerns, Astra has had its pace slowed down, with some reinforcement learning training suspended, as it was believed that Astra's network security capabilities might be at one of the highest risk levels, hence the increased monitoring requirements.