
Anthropic launches Sonnet 5.5, its second model in a week, as the call to slow down stays on paper
🕒 Published on Zendoric: September 29, 2026 · 08:25
Anthropic is debuting Sonnet 5.5, a faster and cheaper version of its flagship Opus 5.5, released just six days ago. The back-to-back launches — with a mirror move at OpenAI too — in practice contradict the call by its own CEO, Dario Amodei, to slow the industry's pace.












































