Deepseek ships improved V4 Pro, open-sources its agent software, and raises API prices

Deepseek has transitioned its V4 Pro model from testing to a public release while simultaneously open-sourcing its agent development tool, Harness v0.1, under an MIT license. The company also implemented significant price increases for its API, specifically raising the cost of cache hits by six times their previous rate. This shift directly impacts developers who rely on agent workflows that frequently access identical data, potentially increasing operational costs for automated systems that depend on repetitive file reads.