Introducing Claude Fable 5.1 and Claude Mythos 5.1 \ Anthropic \ Anthropic

https://www.anthropic.com/claude-fable-and-mythos-5-1

https://x.com/home/status/2094867058747986252

https://x.com/home/status/2094937469871399379

https://x.com/home/status/2094937879822651638