GoKawiilAnthropic launches Fable and Mythos 5.1 with lower costs, fewer false flags
Anthropic released Fable and Mythos 5.1, updated versions of its flagship AI models that cut token costs and reduce false-positive blocks from safety filters. Mythos 5.1 remains restricted to vetted cybersecurity and life sciences partners, while Fable 5.1 is now broadly available via cloud platforms and Anthropic's API. The release also introduces a Zero Data Retention option for Fable through a new Enterprise Frontier Safeguards service arriving in June, letting clients run the model on their own infrastructure while retaining control over misuse monitoring.
GoKawiil's interpretation of the reporting above, not reported fact.
By loosening restrictions and adding enterprise-grade privacy controls, Anthropic is courting business customers wary of data exposure, a competitive edge against rivals like OpenAI. The move also signals a broader industry shift toward giving companies more control over how AI safety monitoring works on their own systems, even as Anthropic insists it still tracks misuse.
- Fable 5.1 is now widely available with lower costs and fewer unnecessary safety blocks.
- Mythos 5.1 stays limited to approved cybersecurity and life sciences partners.
- A new Zero Data Retention option lets enterprises run the model without sending data to Anthropic, launching in June.
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Published there as: “Anthropic’s new Fable release is cheaper, less restrictive”
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