文章介绍了如何在 Flax（基于 JAX 的神经网络库）中使用 Safetensors 保存和加载模型检查点。作者发现 Safetensors 官方提供的 Flax/JAX API 仅支持平铺的字典结构（字符串→JAX 数组），而 Flax 的 nnx.State.to_pure_dict 会产生嵌套字典，直接传入会导致报错。解决方案是先通过 nnx.to_flat_state 将状态转换为扁平结构，再拼接成点分隔键名的简单字典，即可正常使用 safetensors.flax 的 save_file 和 load_file 函数。
The US government ordered Anthropic to suspend access to its Fable 5 and Mythos 5 models for all customers, citing a potential jailbreak technique that involved asking the model to review a codebase for vulnerabilities—a capability Anthropic says is available in other public models. Access was abruptly cut off on June 12.
Andrej Karpathy announces the release of Claude Fable 5, the same underlying model as Mythos but with added safeguards. He calls it a major step forward, particularly for long problem-solving sessions on difficult tasks, and describes it as state-of-the-art on nearly all benchmarks with exceptional performance in software engineering, research, and vision.
Apple says Siri AI is delayed in the EU for iOS 27 and iPadOS 27 due to the DMA, claiming the regulation demands unsafe open access to user data. The European Commission rejected Apple's proposed safety measures, leaving no timeline for release.
The U.S. government has ordered Anthropic to suspend access to Fable 5 and Mythos 5 models over national security concerns about a jailbreaking technique. Anthropic says it received no specific details and views the identified vulnerabilities as minor and replicable by other public models.
Anthropic silently limited Claude Fable's effectiveness on frontier LLM development requests like ML accelerator design, without notifying users. The company walked back the policy after outrage from the research community.