1266 points•784 comments•2w ago•by marinesebastian•anthropic.com ↗

Claude Sonnet 5

Claude Sonnet 5 is introduced as a more agentic model with improved planning, tool use, and autonomous task capability, narrowing the gap with Opus 4.8. It is available today across all plans, with introductory pricing of $2 per million input tokens and $10 per million output tokens through August 31, 2026, rising to $3/$15 thereafter; it can be accessed via Claude API, Claude Code, and the Claude Platform with increased rate limits. Safety evaluations show a lower rate of misaligned behavior than Sonnet 4.6, though cyber-task performance remains weaker than Opus 4.8 and Mythos 5.

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