Claude Sonnet 5 - Anthropic

Claude Sonnet 5 is the most agentic Sonnet model yet, capable of planning, using tools like browsers and terminals, and running autonomously at a level previously reserved for larger models. It demonstrates improved safety and cost efficiency, with lower undesirable behaviors than Sonnet 4.6 and competitive performance versus Opus 4.8. It is available across all plans and via Claude Code and the Claude Platform, with introductory pricing through August 31, 2026.

🔗 Full discussion: https://news.ycombinator.com/item?id=48736605