Benchmarking Agent Harnesses: Kimi K3 Shines, Claude Code Costs 4x More
omarsar0 · x · 2026-08-01
Developers note that with recent token efficiency improvements in models like Qwen and DeepSeek, there's no need to stay loyal to a single agent harness. Recent tests evaluating Kimi K3 across 6 different harnesses (including Pi Agent, OpenCode, and Codex) over 26 tasks revealed:
- Lightweight advantage: Lightweight harnesses like Pi and Hermes perform better with frontier open models.
- Cost and efficiency gaps: Codex ranked last in success rate, while Claude Code costs about 4x more than Hermes.
Related event: Agent Framework Benchmarks: Kimi K3 Shines in Lightweight Efficiency(2 posts)→
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