AWS Strands Harness: Same Model, 77% Lower Cost, Higher Accuracy
AWS open-sourced Strands Harness, a pre-assembled agent runtime that decouples the model from the harness. Benchmarks on Terminal-Bench 2.1 with Claude Fable 5 show Strands costs $56.29 and scores 69.7 versus Claude Code's $248.05 and 61.8, achieved via context management (1500-token tool-result offloading, 85% compaction), layered memory, progressive skill loading, and prompt caching.
