AI Architecture Path
Aug 24, 2026 · Artificial Intelligence
Why Agent Success Depends on the Runtime Framework, Not the Model – OpenAI Codex Harness (114K+ Stars)
OpenAI’s open‑source Codex Harness dramatically improves agent performance—ARC‑AGI‑3 scores jump from 13.3% to 38.3% and token usage drops six‑fold—by moving the execution logic out of chat windows into a dedicated runtime, and the article details its architecture, components, real‑world case studies, and selection guidance.
AI AgentsBenchmarkCodex Harness
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