The Two Best AI Models/Enemies Just Got Released Simultaneously

The two models that you will hear discussed for at least the next two months - Claude Opus 4.6 and GPT 5.3 Codex - just got released within 26 mins or each other. The full breakdown of around 250 pages of reports, with just the most interest moments, from the battle of which is best, Claude personhood, the surprising misbehaviour of Opus 4.6, and much more https://assemblyai.com/aiexplained Check out my fast-growing (!) app, free to use, and code INSIDER15 for Pro: https://lmcouncil.ai AI Insiders ($9): https://www.patreon.com/AIExplained Chapters: 00:00 - Introduction 00:54 - Self-improvement? 02:44 - Knowledge Work 05:30 - Overly agentic behaviour 09:12 - Who Shouldn’t Use Claude Opus 11:39 - Step-change? 15:09 - Claude’s ‘Personhood’ Hassabis Roadmap: https://www.patreon.com/posts/hassabis-roadmap-149750869 Release of Opus 4.6: https://www.anthropic.com/news/claude-opus-4-6 212 Page System Card: https://www-cdn.anthropic.com/0dd865075ad3132672ee0ab40b05a53f14cf5288.pdf Claude Code Tip: https://x.com/bcherny/status/2019475897691124107 GPT Codex 5.3: https://openai.com/index/introducing-gpt-5-3-codex/ System Card: https://openai.com/index/gpt-5-3-codex-system-card/ Browse Comp: https://arxiv.org/pdf/2504.12516v1 Finance Agent: https://www.vals.ai/benchmarks/finance_agent Terminal Bench 2: https://arxiv.org/pdf/2601.11868 Vending Bench: https://andonlabs.com/blog/opus-4-6-vending-bench My X post: https://x.com/AIExplainedYT/status/2016851303436095647 Anthropic Apology: https://x.com/ch402/status/2014066134194995256/photo/1 Altman rebuttal: https://x.com/sama/status/2019139174339928189 https://x.com/sama/status/2019140276246442089 4% of GitHub: https://x.com/dylan522p/status/2019490550911766763 Non-hype Newsletter: https://signaltonoise.beehiiv.com/ Podcast: https://aiexplainedopodcast.buzzsprout.com/