New launchAnthropic · Announced 2026-09-28 · Found by us 10/13/2026

Claude Sonnet 5.5 promises faster work at lower cost

Anthropic has introduced Claude Sonnet 5.5 as an upgrade over Sonnet 5. It says the model runs 30% faster and costs up to 30% less for most work.

What changed

Anthropic has announced Claude Sonnet 5.5. Compared with Sonnet 5, the company says it runs 30% faster. It also says costs are up to 30% lower for most work.

Why it may matter for your work

Teams already using Sonnet could see shorter waits and lower running costs. Actual savings may depend on the work, since the announcement qualifies the cost reduction as “up to” 30%.

What it can actually do

Positioned as an upgrade over Sonnet 5 for most work; no specific tasks are described.

Limits to check

The page does not give exact prices, testing conditions or access details. The stated cost reduction is up to 30% for most work.

“A clear upgrade over Sonnet 5 that runs 30% faster and costs up to 30% less for most work.”From the linked source page