Anthropic just launched a Mythos-tier model called Fable 5. 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. I unpacked the whole story in my new video 👉 https://youtu.be/qipJ7umHjAs #programming #ai #claude
Anthropic just launched a Mythos-tier model called Fable 5. 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.
I unpacked the whole story in my new video 👉 https://youtu.be/qipJ7umHjAs
#programming #ai #claude