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DeepSeek open-sources coding-agent harness before V4-Pro API price hike

Harness v0.1 lets developers swap models, tools and runtimes, while higher V4-Pro rates take effect August 16th.

By RuntimeWire Staff · Published Aug 14th, 2026, 8:15pm CT

Illustration of DeepSeek's Harness v0.1 interface showing an AI coding agent swapping models, tools, and runtimes with a note about V4-Pro API pricing.

Harness v0.1 lets developers swap models, tools and runtimes, while higher V4-Pro rates take effect August 16th.

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