Claude Fable 5 to be redeployed globally with enhanced cybersecurity classifiers after US government discussions

After a series of productive conversations with the US government, we're redeploying the model with a new set of classifiers to target and block more cybersecurity tasks.

In the near term, some routine tasks like coding and debugging will fall back to Opus 4.8.

We'll continue to refine these classifiers over the coming weeks to reduce false positives and better distinguish genuine misuse from legitimate requests.

We've also begun drafting a consensus framework—with Amazon, Microsoft, Google, and other Glasswing partners—for assessing