Factory engineer: third-party agent harnesses can beat Claude Code and Codex even on their own models
matanSF · x · 2026-10-14
Factory's @TaylorTheSavage argues the assumption that model companies build the best harnesses for their own models is wrong: third-party harnesses can outperform Claude Code and Codex on specific workloads and even generally, thanks to different incentives, while staying harness-agnostic avoids overfitting to one model. Alongside, Factory shipped Environments, its sandbox foundation for cloud agents, now generally available.
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