Claude 4 (Opus 4 and Sonnet 4)
Opus 4 and Sonnet 4 can use tools during extended thinking; Opus 4 is aimed at long agent tasks.
Official source
Introducing Claude 4anthropic.com · published
Opus 4 and Sonnet 4 can use tools during extended thinking; Opus 4 is aimed at long agent tasks.
Introducing Claude 4anthropic.com · published