Claude Opus wrote a Chrome exploit for $2,283
Security Claude Opus wrote a Chrome exploit for $2,283 Pause your Mythos panic because mainstream models anyone can use already pick holes in popular software Anthropic withheld its Mythos bug-finding…
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I recreated Fable 5 with Opus and agent loops, and it's close enough that I stopped missing the banned model
…Making the most out of Opus 4.8 You might not be using Opus to its full potential While everyone's attention is now on Fable 5, Claude's Opus 4.8…
Anthropic is doubling Claude AI limits during off-peak hours
…Ask Sonnet 4.6 to generate a detailed prompt for a tough Opus task, and then hand over the prompt to Opus.
Switching to Claude? These 4 habits help you avoid hitting usage caps
…But while it can be tempting to use Opus for everything, it's an absolute fiend when it comes to tokens. For that reason, you’re better off keeping Opus stowed until…
Discussions and forums
What I changed in how I use Claude Code after Anthropic's postmortem
After watching Anthropic's recent postmortem (anthropic.com/engineering/april-23-postmortem), I've been thinking about the way I approach Claude Code differently. They lowered default reasoning effort to fix latency, cal…
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Show HN: How to analyze your LLM output – A behavioural health monitor for LLMs
Hey HN! We're Dr. Kashyap Thimmaraju and Giuseppe Canale from Silicon Psyche. We've built Posture Sequence Analysis (PSA), a behavioural health monitor for LLMs and AI Agents.Why we built PSAWe built PSA because we wante…
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Autonom Exploits entwickeln: Anthropics neues Modell ist so stark, dass es nicht veröffentlicht wird
…Anthropics Opus 4.6 findet 22 Sicherheitslücken in Firefox Bei den in der JavaScript-Engine von Firefox 147 entdeckten Sicherheitslücken brauchte Opus 4.6 noch mehrere Hundert Anläufe, um zwei Exploits zu…
Anthropic releases its first Mythos-class model Claude Fable
…entirely on Fable responses, without falling back to Opus 4.8. The company is also releasing Claude Mythos 5, but provided few details on what that means. In a blog, Anthropic…
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Cyber evaluations of Claude 4
Frontier Red Team Detailed cyber evaluations of Claude 4 Jul 15, 2025 Anthropic (with Pattern Labs ) We believe we are at a crucial period for cybersecurity and AI, with models advancing toward…
Is Claude Down? Here's the Latest
…All Sonnet and Opus models reached an error rate of ~10% during the first half hour or so of the outage, with Opus 4.8 having an average error rate of 10…
Anthropic's new Sonnet 5 model is better at the tasks that are running up enterprise bills - Engadget
…The company says its new Sonnet 5 model is capable of handling agentic tasks and delivering performance specs similar to its recent Opus models, but at lower prices . Starting September 1, Sonnet…