Agents
AWS open-sources Strands harness, claiming 28% lower token cost than rival harnesses on the same models
Strands Agents released Strands harness (blog post dated 21 Sept, on the HN front page 23 Sept with 136 points). It is a general-purpose, pre-assembled agent harness with shell, file and web tools, context management with prompt caching, long-term memory and helper-agent delegation. Strands claims 28% lower token cost than competing harnesses running identical Claude or GPT models across six benchmarks, and says it cost 77% less than Claude Code on Fable 5 while scoring higher on Terminal Bench 2.1. These are vendor-run benchmarks. Install with pip install strands-harness or npm install @strands-agents/harness; harness-cli v0.1.2 followed on 23 Sept with the MCP client 2.0 swap.
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