Anthropic launches Claude Sonnet 5.5: faster, cheaper per task, with cyber safeguards
On 28 September 2026 Anthropic introduced Claude Sonnet 5.5, the second model in the Claude 5.5 family: more than 30% faster than Sonnet 5, up to 30% lower cost per task despite the same per-token price ($2/$10 per million), and the first Sonnet with cyber and anti-distillation safeguards like those on more capable models. Available on the Claude platform, AWS, Google Cloud and Microsoft Azure.