Anthropic has resumed global access to Fable 5, making it available on the Claude Platform and other services starting July 1. The decision follows the lifting of export controls on June 30, which had previously restricted access to foreign users. Fable 5 will be included in up to 50% of weekly usage limits for Pro, Max, Team, and select Enterprise plans through July 7, after which it will be available via usage credits. Access on AWS, Google Cloud, and Microsoft Foundry will be re-enabled as soon as possible. Source: anthropic
The export controls were imposed on June 12 after the US government became aware of a report by Amazon researchers that demonstrated a method to bypass Fable 5’s safeguards. The report showed that the model could identify software vulnerabilities and even produce code demonstrating how to exploit them. In response, Anthropic collaborated with the government and other partners to develop an improved safety classifier that blocks the reported technique in over 99% of cases. The new classifier may also flag some benign requests during routine coding tasks, but the company plans to refine it to reduce false positives. Source: anthropic
Anthropic emphasized that Fable 5 was launched with the strongest safeguards ever applied to a model, including a defense-in-depth approach that combines multiple safety mechanisms. These include training the model to decline dangerous requests and using classifiers to detect potentially harmful cybersecurity tasks. The company also noted that the reported bypass technique did not expose any unique cyber capabilities, as it involved routine defensive cybersecurity work. Source: anthropic
