Anthropic just shipped the most powerful model they've ever released to the public: Claude Fable 5. A Mtyhos-level model. It broke coding benchmarks (around 80% on SWE-Bench Pro vs GPT-5.5's 58), and did a 50-million-line code migration in a single day. But there's a catch: Fable 5 is really their secret "Mythos" model with a leash on it, and the most jaw-dropping numbers you've seen belong to a version you can't actually buy. In this video I break down what Fable 5 really is, the benchmarks vs GPT-5.5, Opus 4.8 and Gemini 3.1, the safety filters that are blocking doctors and security engineers, the price, and why "the model you read about isn't the model you can use." 📘 Want to actually understand how models like this work and how to build with them? Get my book, Get Insanely Good at AI: https://getaibook.com 💬 What's your read: responsible release, or warning-while-selling? Drop a comment. 👍 Like and subscribe for more AI engineering breakdowns. #ClaudeFable5 #Anthropic #AInews #Claude #AIengineering
Anthropic just shipped the most powerful model they've ever released to the public: Claude Fable 5. A Mtyhos-level model.
It broke coding benchmarks (around 80% on SWE-Bench Pro vs GPT-5.5's 58), and did a 50-million-line code migration in a single day. But there's a catch: Fable 5 is really their secret "Mythos" model with a leash on it, and the most jaw-dropping numbers you've seen belong to a version you can't actually buy.
In this video I break down what Fable 5 really is, the benchmarks vs GPT-5.5, Opus 4.8 and Gemini 3.1, the safety filters that are blocking doctors and security engineers, the price, and why "the model you read about isn't the model you can use."
📘 Want to actually understand how models like this work and how to build with them? Get my book, Get Insanely Good at AI: https://getaibook.com
💬 What's your read: responsible release, or warning-while-selling? Drop a comment.
👍 Like and subscribe for more AI engineering breakdowns.
#ClaudeFable5 #Anthropic #AInews #Claude #AIengineering