Anthropic released its most comprehensive threat intelligence report to date, detailing disrupted attempts to weaponize Claude for cyberattacks, influence ops, and biological risks alongside proactive defenses.
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Anthropic launched Claude Fable 5.1 and Claude Mythos 5.1, calling them the world's most advanced models for coding and knowledge work. Fable 5.1 more than doubled Terminal-Bench-Science 0.1 to 52.6% and lifted Terminal-Bench 4.0 from 42.0% to 55.8%, while cutting cache-read prices 75% and typical agentic costs by up to 45%.
Anthropic released Claude Fable 5.1, plus Mythos 5.1 for cyber defenders and life scientists. Fable 5.1 scores 55.8% on Terminal-Bench 4.0 versus 42.0% for Fable 5, more than doubles Terminal-Bench-Science to 52.6%, and is Cursor’s strongest CursorBench 3.2 result at 73.4% max effort. Cache reads are 75% cheaper, cutting typical costs about 25% and highly agentic workloads up to 45%.
Anthropic launched Claude Fable 5.1 and the restricted Mythos 5.1, calling them the world's most advanced models for coding and knowledge work. Fable 5.1 scores 55.8% on Terminal-Bench 4.0 (vs. 42.0% for Fable 5) and more than doubles Fable 5 on Terminal-Bench-Science 0.1 at 52.6%. Cache reads are 75% cheaper, cutting typical cost about 25% and highly agentic workloads by up to 45%. It is already live in Cursor (73.4% on CursorBench 3.2) and GitHub Copilot.
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