Anthropic introduces Claude Sonnet 5.5 before a reported September 29 outage

Anthropic introduced Claude Sonnet 5.5 on September 28, saying it runs more than 30% faster than Sonnet 5 and costs up to 30% less for most work. A commentator said its per-token pricing was unchanged and argued that cost per completed task is the more useful measure. On September 29, WatcherGuru reported Claude was down for many users worldwide.