Fable 5.1 Just Changed What Frontier AI Costs Forever

📚 Work 1-1 w/me to grow your ai agency: https://theaiaccelerators.com/agency 🤖 Transform your business with AI: https://reprisesai.com 🤚 Join the best community for AI entrepreneurs and connect with 18,000+ members: - https://www.skool.com/systems-to-scale-9517/about Sign up to our weekly AI newsletter - https://subscribe-forms.beehiiv.com/v3/forms/485f18d4-e9cd-4ce1-bb0a-c202bc6f0488 I help people build AI systems that generate leads, close deals, and scale businesses. Two kinds of people, specifically: 1. Business owners who want AI installed in their company — done for them — so it runs the parts that used to eat a full team's time. 2. Aspiring entrepreneurs who want to start their own AI business from scratch. I help them get off the ground, land their first clients, hit their first $10K months, and replace their full-time job. Then I make videos showing exactly how it all works — what you need to know about ai through guided tutorials, real builds, on real businesses — right here on YouTube. I founded Reprise AI, an AI consulting and implementation agency. We've deployed AI into 60+ companies across home services, healthcare, real estate, professional services, and e-commerce, driving over $5M in bottom-line revenue for them. I'm also a co-founder of Sync2, which builds voice and front-office AI for healthcare clinics. Alongside the client work, I teach this in the open to millions of people across the world & 20,000+ founders and operators building alongside me in the AI Accelerator community. I taught myself all of this with no technical background — no CS degree, no formal training. That's exactly why I know it's teachable. If I could figure it out, so can you. If you're building something of your own right now or looking to learn and grow your business, you're in the right place. Subscribe, and let's get to work. — Nick 🙋 Connect With Me! Instagram - / nicholas.puru X - https://x.com/NicholasPuru LinkedIn - https://www.linkedin.com/in/nicholas-puruczky-113818198/ 0:00 Fable 5.1 and Mythos 5.1 in 30 seconds 0:27 The 4 things that actually changed 2:27 The data retention correction 3:03 Effort levels: what the dial really does 5:20 Anthropic's migration guide says re-tune it 6:49 The catch at low effort 7:34 Two more things that bite agents 8:08 Breaking changes for API builders 8:37 What to change tonight