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4 results for “Mythos 5.1”
Claude Fable 5.1 and Mythos 5.1 are Anthropic's first models to watermark text outputs; a detection API is available to eligible groups as required under EU law (Ben Patterson/PCWorld)
Anthropic released Claude Fable 5.1 and Mythos 5.1, its first models to embed invisible watermarks in text outputs, with a detection API made available to eligible groups to comply with EU regulatory requirements.
Sep 2, 2026
Anthropic's Claude Fable 5.1 and Mythos 5.1 arrive with a 75% cost reduction for Fable cache reads - Venturebeat
Anthropic released two new model versions—Claude Fable 5.1 and Mythos 5.1—with a claimed 75% reduction in cost for Fable cache reads, signaling an efficiency improvement in its proprietary caching architecture.
Sep 2, 2026
:Claude: Fable 5.1 and Mythos 5.1 - Anthropic
Anthropic announced two new model versions—Fable 5.1 and Mythos 5.1—under the Claude brand, with no substantive details provided about capabilities, benchmarks, release timing, or intended use.
Sep 2, 2026
Claude Fable 5.1 and Claude Mythos 5.1
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Sep 2, 2026