Skip to contentNewskeryx

2 October 2026

Anthropic releases faster, cheaper Claude Sonnet 5.5

First reported

Deep Learning Weekly ran this on .

  • Anthropic, maker of the Claude chatbot, released Sonnet 5.5, a new version that costs 30% less per task by running faster and needing fewer tool calls.
  • The model performs nearly as well as Opus 5.5, Anthropic's most powerful model, on two technical benchmarks measuring real-world task completion.
  • Faster processing and reduced tool calls mean developers can run more tasks for the same budget, or fewer resources for the same output.

How it was covered

Deep Learning WeeklyEditorial team

Anthropic released Sonnet 5.5 offering 30% cost reduction per-task through faster speeds and fewer tool calls, scoring 70.6% on Terminal-Bench 4.0 and 80.1% on OSWorld 2.1, nearly matching Opus 5.5 performance.