China might have just made AI agents insanely fast.
DeepSeek V4 Flash 4.1 + Token Harbor gives you a free API for building and automating AI agents without another monthly bill. Comment “Agent OS” for the guide.
Towards AI spent about $600 on evals racing 6 context-trimming techniques against doing nothing
Doing nothing won Keeping the full history cost $0.11 per turn against $0.24 for their tuned production setup, answered 4 seconds faster, and recalled 92% of earlier facts against
Deepseek-v4.1-flash made this, with help from LTX 2.5
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