OpenAI Codex vs DeepSeek Harness 2026: Best AI Coder?
📅 Updated: August 14, 2026 · ⏱️ 11 min read OpenAI Codex vs DeepSeek Harness is the AI-coding-agent matchup that actually matters in 2026. One is polished, managed, and expensive. The other is open-source, self-hostable, and cheap-per-token. This comparison cuts straight to the buying decision: w…