An update on recent Claude Code quality reports
…requires more detail.” After multiple weeks of internal testing and no regressions in the set of evaluations we ran, we felt confident about the change and shipped it alongside Opus 4.7…
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Top stories
Claude Opus 4.8 just proved AI is finally growing a backbone — and it crushed ChatGPT in 7 brutal tests
…But the launch of Claude 4.8 Opus promises a paradigm shift — moving away from artificial flattery and toward radical, intellectual honesty. To see if Anthropic has truly cured the "AI Yes…
Claude Fable 5 caught bugs GPT-5.5 and Opus 4.8 missed, then the US government forced it offline
…rerouted to Opus 4.8 with a notification like the other classifiers did. The origin story makes sense on the surface, given that in February, Anthropic published a detailed breakdown of what…
Anthropic's latest feud with the Trump admin may actually help it, sales data suggests | TechCrunch
…When it can see the model details — in about one-third of transactions — businesses are mostly spending on various flavors of Claude Opus, particularly the later versions. Opus is the model that…
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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Eval awareness in Claude Opus 4.6’s BrowseComp performance
Engineering at Anthropic Eval awareness in Claude Opus 4.6’s BrowseComp performance BrowseComp is an evaluation designed to test how well models can find hard-to-locate information on the web…
XBOW tests Anthropic's Mythos Preview for offensive security
…Below are the details on how we tested Mythos Preview, what we found, and what it means. Spoilers: This model is a major advance. It is substantially better than prior models at…
Anthropic eyes going public as it files official submission to SEC
…details contained within a filing like this would be something unprecedented, considering the nature of an AI startup. Claude has been steadily improving as a model. A recent update brought Claude Opus…
Claude (AI) - Wikipedia
…May 28, 2026. ↑ "Introducing Claude Opus 4.8" . www.anthropic.com . Retrieved May 28, 2026 . ↑ Nolan, Beatrice (March 26, 2026). "Exclusive: Anthropic left details of an unreleased model, an upcoming exclusive CEO…
Claude (language model) - Wikipedia
…May 28, 2026. ^ "Introducing Claude Opus 4.8" . www.anthropic.com . Retrieved May 28, 2026 . ^ Nolan, Beatrice (March 26, 2026). "Exclusive: Anthropic left details of an unreleased model, an upcoming exclusive CEO…
Anthropic Archives - 9to5Mac
…Expand Expanding Close Anthropic upgrades Claude with new Opus 4.8 model, details here Zac Hall May 28 2026 - 10:09 am PT Anthropic has released its latest AI model with Claude…