Anthropic launches Sonnet 5.5: 30% faster and up to 30% cheaper than Sonnet 5
felixrieseberg · x · 2026-09-29
Felix Rieseberg announces the launch of Claude Sonnet 5.5: smarter and more tasteful than Sonnet 5, positioned for workloads that don't need the power of Opus or Fable.
Key numbers: 30% faster and up to 30% cheaper for most work. He also had it build a few games, shared in the thread as demos.
Related event: Anthropic Launches Claude Sonnet 5.5: Over 30% Faster, Up to 30% Cheaper(58 posts)→
More from Models
- Jason Calacanis threatens to ditch $20k/yr Claude as $40/mo Grok Bot outperforms it — chrisfleck · 2026-11-13
- Dan Shipper's weekend plan: let Claude Fable 5.2 build a custom Supernote OS — danshipper · 2026-11-13
- Alibaba teases Qwen4 with stronger coding and agentic capabilities at Nov 17 Hong Kong summit — teortaxesTex · 2026-11-13
- Baidu opens ERNIE 5.5 Flash Preview via OpenRouter — Baidu_Inc · 2026-11-13
- Hybrid Decision Model learns when to reason: 72.5% lower latency at higher accuracy — hbouammar · 2026-11-13
- AI×Bio benchmarks called out as LLM-generated "benchslop" that may be impairing bio-reasoning — anshulkundaje · 2026-11-13