AI model

Claude Sonnet 5

0 mentions in 7 days · 2 in 30 days · 2 total · first seen Sep 2, 2026 · last 12d ago

Timeline2 articles

Four major AI models suffer rare overlapping downtime

OpenAI, Anthropic, xAI, and Google AI services suffered rare overlapping outages on Thursday, with most incidents resolved within hours.

Anthropic reported a partial outage with elevated errors on Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 starting at 9:23 am ET, identifying the cause within about 15 minutes and resolving it by 12:16 pm, with a brief Claude Sonnet 5 error spike after noon. OpenAI reported elevated errors across ChatGPT and Codex from 10:43 am, marking the issue resolved at 12:55 pm after a mitigation. xAI's Grok showed a user-facing error message as DownDetector reports surged from fewer than 10 to 1,365 by 9:45 am, and Google also experienced interruptions during the same window.

Ars Technica · AISep 3, 18:10 UTC · 12d agoAI industry

Claude Mythos only model to complete full cyber kill chain, experts say

Booz Allen's Cyber Weapon Index finds only Claude Mythos completed an autonomous full cyber kill chain; mainstream AI-driven attacks deemed imminent.

Booz Allen's first Cyber Weapon Index tested 18 US and Chinese AI models on autonomous offensive cyber capability, combining vulnerability research and kill-chain attainment scores. Anthropic's Claude Mythos topped the index at 80 and was the only model to autonomously complete a full cyber kill chain, achieving administrator access with stolen credentials in every attempt and full domain compromise even without credentials; Grok-4.5 (49), GPT-5.6 Sol (46), Muse Spark 1.1 (38), and Kimi K3 (38) followed. All nine frontier API models scored zero against real-world bugs versus near-ceiling scores on planted ones, and pairing Claude Sonnet with a well-built attack harness rivaled Mythos' performance. Booz Allen predicts most tested models will reach Mythos' weaponization level within six months, calls AI-enabled mainstream attacks imminent, and urges sector-specific critical-infrastructure resilience deadlines and US cyber 'overmatch'.

The Register · SecuritySep 2, 21:31 UTC · 13d agoAI safety & security

Appears with

vendor OpenAI 2 vendor xAI 2 vendor Anthropic 2 ai model Claude Mythos 5.1 1 ai model GLM-4.5-Air 1 ai model GLM-5.2 1 ai model Claude Opus 5 1 ai model GPT-5.6 Sol 1 ai model Grok 1 ai model Grok-4.5 1 ai model Kimi K3 1 ai model Muse Spark 1.1 1 organization Anthropic 1 organization Booz Allen 1 organization OpenAI 1 ai model GPT-5.5-Cyber 1

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