Claude Sonnet 5
Anthropic
anthropic/claude-sonnet-5Claude Sonnet 5 is Anthropic's most capable Sonnet-tier model, bringing near-Opus intelligence to coding, agentic workflows, and professional knowledge work at Sonnet-level cost. It is a strict improvement over Sonnet 4.6 across the cost-performance curve and serves as the default model for Anthropic's Free and Pro plans.
Cost rate
2x
Context
1M
Released
Jun 30, 2026
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ReasoningTool callingStructured outputs