DeepSeek Harness records every agent run like game footage.
Freeze it, branch it, replay from any point. Everything the model sees and every step it takes gets written down in order, never wiped. Agent did something weird? Scroll back and see exactly why. That's the gap between
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◈ Doubao 0.2 yuan / DeepSeek V4 Flash 1 yuan vs GPT-5.5 $5 / million Tokens ◈ GPT-4o has been reduced from $15 to $2.5, Claude Sonnet is $2 for a limited time ◈ Highly recommended LeapNode: Alipay direct payment to buy overseas models + six major application markets (graphics/videos/short plays/quantitative trading/e-commerce/APP websites)
DeepSeek Harness looks brand new.
Its engine is secretly 4 years old. The core system is called Cordis. It powered an open-source chatbot project for 4 years before DeepSeek adopted it. That's why a v0.1 preview feels this solid out of the gate. The community noticed: →
DeepSeek Harness vs Claude Code, same exact prompt: one finished in 11 minutes, the other took 30.
The prompt: "build a 3D animated website and add a working Tetris game." No extra context. The honest results: → Harness: done in 11 min, functional, but cartoony → Claude
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