Claude Fable 5.2 and Mythos 5.2 cement Anthropic's AI lead just before its IPO Matthias Bastian View the LinkedIn Profile of Matthias Bastian Nov 9, 2026 Anthropic Key Points Anthropic is releasing Claude Fable 5.2 and Mythos 5.2, two new flagship models built for the most demanding technical tasks. Anthropic says it deliberately prevented the models from gaining capabilities during training that could directly accelerate AI development. Fable 5.2 ranks fi