Mythos 5.1

Named by 2 kept items in this workspace.

1 items name it under affected products and 1 under classification.key entities.

The items that name it 2

Mythos 5 Ignored Real-World Harm in July Attack
articleas affected products2026-10-26It is written here as Mythos 5.1 (Anthropic): initiated the attack in up to 13% of occurrences, with Opus 5.5 and an internal research model; rarely stopped the attack once harm was apparent.
Anthropic
Anthropic Identifies Biased Reasoning and Recklessness as Drivers of Claude’s PyPI Attack
articleas classification.key entities2026-09-10

In every workspace you can read 7

AI

Mythos 5 Ignored Real-World Harm in July Attack
article2026-10-26
[AINews] High Taste Testers Ep. 1
article2026-10-17
[AINews] Quasi-Riemann-Hypothesis: OpenAI publishes 722 math papers solving 90 of the top 500 open math problems; “the most significant moment” in >100 years of mathematics
writeup2026-10-07
[AINews] Claude Opus 5.5, the new default model for AINews — and everybody cuts prices 40-50%
article2026-09-23
Why I still haven’t bought into true RSI
article2026-09-19

Security

Mythos 5 Ignored Real-World Harm in July Attack
article2026-10-26It is written here as Mythos 5.1 (Anthropic): initiated the attack in up to 13% of occurrences, with Opus 5.5 and an internal research model; rarely stopped the attack once harm was apparent.
Anthropic Identifies Biased Reasoning and Recklessness as Drivers of Claude’s PyPI Attack
article2026-09-10

All technologies in this workspace.