Claude Sonnet 5
Claude Sonnet 5 is Anthropic's most agentic Sonnet model, supporting planning, browser and terminal tool use, and autonomous operation that approaches Opus 4.8 performance on agentic search (BrowseComp) and computer use (OSWorld-Verified) at higher effort settings. It is the default model for Claude.ai Free/Pro, available on Max/Team/Enterprise, Claude Code, and the API as claude-sonnet-5, with permanent pricing of $2 per million input tokens and $10 per million output tokens, and a lower rate of undesirable behaviors than Sonnet 4.6.