Anthropic unveils Claude Fable 5.1, which is generally available, and Mythos 5.1, for trusted partners and with cybersecurity and life sciences safeguards (Anthropic)
Anthropic says Fable 5.1 is live now, while Mythos 5.1 is limited to trusted partners under added safety controls.
The company describes the new Claude models as its most advanced for coding and knowledge work. Fable 5.1 is generally available in Claude Code and the Claude Platform, with the same listed input/output pricing as Fable 5 and cheaper cache reads. Anthropic says the model improves on long-running tasks, coding, science benchmarks, and cost per task. Mythos 5.1 is being held back for trusted partners, with safeguards for cybersecurity and life sciences use. Techmeme's note
The company describes the new Claude models as its most advanced for coding and knowledge work. Fable 5.1 is generally available in Claude Code and the Claude Platform, with the same listed input/output pricing as Fable 5 and cheaper cache reads. Anthropic says the model improves on long-running tasks, coding, science benchmarks, and cost per task. Mythos 5.1 is being held back for trusted partners, with safeguards for cybersecurity and life sciences use. Techmeme's note
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