GoKawiilAnthropic launches Claude Fable 5.1 and Mythos 5.1 with cheaper pricing, new privacy system
Anthropic released two versions of its newest AI model—Fable 5.1, available to the public, and Mythos 5.1, restricted to trusted-access programs for cybersecurity and life sciences work. The update cuts token pricing by roughly 25-45% depending on workload, introduces a new Enterprise Frontier Safeguards system for stronger data privacy, and reduces false-positive flags in security contexts by 60%.
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The pricing cuts and privacy architecture respond directly to enterprise complaints that have slowed AI adoption in regulated industries, signaling Anthropic's push to compete more aggressively on cost and trust rather than just raw capability. Allowing the model to find software vulnerabilities—without enabling exploit creation—also marks a notable step toward AI assisting real security work while Anthropic tries to keep dual-use risks in check.
- Fable 5.1 is public while Mythos 5.1 is restricted to vetted cybersecurity and biology partners.
- New Enterprise Frontier Safeguards let customers keep data on their own infrastructure for near-zero-retention privacy.
- Agentic workloads could see up to 45% cost savings, alongside a 60% drop in cybersecurity false positives.
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Published there as: “Claude Fable 5.1 and Claude Mythos 5.1”
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