Claude Opus 5.5 costs 40% less to run and runs 30% faster than Opus 5, with input tokens priced at $4 per million and cache reads cut by 60% to $0.20 per million.
💬 Users welcomed promised improvements to the model's writing style and questioned how it positions against Claude Fable.
→ discussion
598 points · 535 comments · #breaking · @HNDigestEn