Fable 5.1 is here, and its REALLY good

Claude Fable 5.1 is Anthropic's new frontier model, with cache reads cut by 75% and a claimed 25 to 45% cost reduction on agentic work. We break down why that discount only applies to API usage, why Artificial Analysis found Fable 5.1 on max effort more expensive per task than Fable 5, and which effort level actually saves you money. 🔗 Relevant Links Blog: https://www.anthropic.com/claude-fable-and-mythos-5-1 Artificial Analysis: https://artificialanalysis.ai/ ❤️ More about us Radically better observability stack: https://betterstack.com/ Written tutorials: https://betterstack.com/community/ Example projects: https://github.com/BetterStackHQ 📱 Socials Twitter: https://twitter.com/betterstackhq Instagram: https://www.instagram.com/betterstackhq/ TikTok: https://www.tiktok.com/@betterstack LinkedIn: https://www.linkedin.com/company/betterstack 📌 Chapters: 0:00 - Intro 0:26 - Fable vs Mythos 0:48 - The Cache Pricing Catch 1:32 - Effort Levels vs Cost (Benchmarks) 3:13 - Cursor Bench Results 4:26 - F1 Game Test 8:39 - Website Design Test 12:53 - Data Retention and Safeguards 13:25 - Writing Style 13:38 - Outro