Fable 5.2: The Self-Improvement Loop Keeps Loopin’ … (plus Gemini Carbon)

I’ve read the full Fable 5.2 report at 264 pages, the 30 page METR RSI report, and tested Gemini Carbon and Fable 5.2 hundreds of times. There’s too much to cover in one video, but let’s explore everything from how fast AI is accelerating AI, five benchmarks few others will talk about, why Simple Bench got saturated but meta-simple bench might not have, Internal model 4, remote labour automation and much more https://www.assemblyai.com/aiexplained Exclusive Vids($9!): https://www.patreon.com/AIExplained 00:00 - Introduction 00:49 - how good are Fable 5.2 and Carbon? 09:01 - smarter, but still missing some common sense 15:49 - how fast is AI improving itself? 23:51 - small gains, big consequences 26:33 - it knows when you're watching Introducing Claude Fable 5.2 and Mythos 5.2: https://www.anthropic.com/claude-fable-and-mythos-5-2 Claude Fable 5.2 and Mythos 5.2 System Card: https://assets.claude.com/27d60918d218125e7504bc7354c4b4626ec56b11.pdf METR: AI R&D acceleration at Anthropic: https://metr.org/blog/2026-11-05-anthropic-ai-rd-acceleration-assessment/ Epoch AI: Fable 5.2 sets a new capabilities record: https://x.com/EpochAIResearch/status/2119903415363113088 SemiAnalysis: Fable 5.2's coding gains and RSI plateau: https://x.com/SemiAnalysis_/status/2119961452496756926 SemiAnalysis GDPx: https://gdpx.semianalysis.com/ Remote Labor Index: https://www.remotelabor.ai/ Remote Labor Index paper: https://arxiv.org/pdf/2510.26787 Greg Burnham on Fable 5.2's Remote Labor Index score: https://x.com/GregHBurnham/status/2120155251240292619/photo/1 Agents' Last Exam leaderboard: https://agents-last-exam.org/leaderboard AA-Omniscience: Knowledge and hallucination benchmark: https://artificialanalysis.ai/evaluations/omniscience ExploitGym leaderboard: https://benchlm.ai/benchmarks/exploitgym ExploitGym: Turning vulnerabilities into real attacks: https://arxiv.org/pdf/2605.11086 BenchCAD leaderboard: https://benchcad.com/leaderboard BenchCAD paper: https://arxiv.org/pdf/2605.10865 OpenAI: Accelerating engineering for the physical world: https://openai.com/index/accelerating-engineering-for-the-physical-world/ Google: Gemini 4 Carbon is now available: https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-4-carbon-now-available/ Justin Lo: MaxxBench tests coding robustness: https://x.com/loresjpg/status/2118880329490637049/photo/1 Claude: Fable 5.2 and Mythos 5.2 capabilities and speed: https://x.com/claudeai/status/2119867117642146270/photo/1 Washington Post: Cathedral researchers got inside Anthropic: https://www.washingtonpost.com/technology/2026/10/26/researchers-cybersecurity-start-up-cathedral-got-inside-anthropic/ Max Winga: Dario Amodei's testimony on AI extinction risk: https://x.com/maxwinga/status/2119034229983986049/photo/2 Jared Kaplan's testimony on Anthropic's commercial structure: https://x.com/_smitop/status/2119870258919969066/photo/2 Anthropic: AI-driven R&D risk disclosure excerpt: https://pbs.twimg.com/media/HWxojYda4AAu5c9?format=jpg&name=900x900 Mrinank Sharma's Anthropic resignation letter: https://x.com/MrinankSharma/status/2020881722003583421/photo/1 Chris Olah on Pope Leo XIV's encyclical: https://www.anthropic.com/news/chris-olah-pope-leo-encyclical LessWrong: Claude 3's launch and GPT-4 performance claims: https://www.lesswrong.com/posts/JbE7KynwshwkXPJAJ/anthropic-release-claude-3-claims-gpt-4-performance Alex Albert: Bringing Leonardo da Vinci's notebooks to life: https://x.com/alexalbert__/status/2119916954337349737 Claude: Watching subagents work inside a project: https://x.com/claudeai/status/2120174853856821549 IntegrityBench: https://integrity-bench.com/ SimpleBench: https://simple-bench.com/ Non-hype Newsletter: https://signaltonoise.beehiiv.com/ Podcast: https://aiexplainedopodcast.buzzsprout.com/