New Claude Opus 4.8: 15 Things You May’ve Missed

The ‘best’ generally available AI model just dropped, but there is plenty I bet you missed about what it is, how it performs, and what the release tells us. 15 highlights from the 244 page system card, plus private testing, leader interview and more. AI Insiders ($9!): patreon.com/AIExplained Chapters: 00:00 - Introduction 00:49 - Mythos in Weeks 01:49 - Adaptive not necessary 02:26 - Honesty? 04:37 - Flagging Uncertainty 04:57 - Benchmarks 08:54 - Mythos will be even better 10:30 - Business skillz 11:15 - Model Welfare 12:16 - Cyber Comparable 13:10 - Misalignment Concerns 16:22 - Meta Inabilities 17:58 - Code flagging 18:34 - Go to sleep 18:50 - Fast Mode 20:21 - Dynamic Workflows Opus 4.8 Paper: cdn.sanity.io/files/4zrzovbb/website/c886650a2e96fc0925c805a Release: anthropic.com/news/claude-opus-4-8 Chips: theinformation.com/articles/anthropic-talks-use-microsofts-a anthropic.com/news/expanding-our-use-of-google-cloud-tpus-an anthropic.com/news/higher-limits-spacex Patreon Vid: patreon.com/posts/re-up-anthropics-159289449 GDPVal: artificialanalysis.ai/evaluations/omniscience arxiv.org/abs/2510.04374 Amodei Technical Debt: youtube.com/watch?v=7xco5Qd2Oo8 Dynamic Workflows: x.com/ClaudeDevs/status/2060044853279617150 x.com/_catwu/status/2060054180379689074/photo/1 claude.com/blog/introducing-dynamic-workflows-in-claude-code simple-bench.com/ Check out my fast-growing (!) app, free to use, and code INSIDER15 for paid tiers: lmcouncil.ai Non-hype Newsletter: signaltonoise.beehiiv.com/ Podcast: aiexplainedopodcast.buzzsprout.com/