They mention "the first model in our new Claude 5.5 family". Obviously that means Fable 5.5, but hopefully also a usable update to Sonnet and Haiku. Sonnet 5 hasn't really had a place in the line up for anyone I feel.
Maybe Anthropic finally felt the pressure from MiMo, DeepSeek, GLM Flash and Luna.
It does mention sonnet and haiku.
And not fable lol
At the end of the post they said Sonnet 5.5 and Haiku 5.5 are coming soon.