---
title: "DeepSeek ships V4 Pro, open-sources its agent tool, raises API prices"
url: https://www.parallelquant.com/posts/deepseek-ships-v4-pro-open-sources-its-agent-tool-raises-api-prices-299133
source_name: "The Decoder"
source_url: https://the-decoder.com/deepseek-launches-an-improved-v4-pro-model-raises-api-prices-and-makes-its-agent-software-open-source/
published: 2026-08-13T16:27:32.000Z
topics: ["open source", "llms", "agents"]
publisher: "Parallel Quant"
---

# DeepSeek ships V4 Pro, open-sources its agent tool, raises API prices

*2026-08-13 · Source: [The Decoder](https://the-decoder.com/deepseek-launches-an-improved-v4-pro-model-raises-api-prices-and-makes-its-agent-software-open-source/)*

DeepSeek moved its flagship V4 Pro model out of testing and released its agent software, Harness v0.1, under the MIT license. At the same time it raised API prices, with cache-hit costs jumping sixfold, the largest price increase yet for agent workflows that repeatedly read the same files.

**Why it matters:** Open-sourcing the agent harness while raising inference prices suggests DeepSeek sees agent orchestration tooling as commoditized but compute as where it captures value. The steep cache-cost hike could push developers to rethink how agent workflows handle repeated context reads, since that's now the most expensive part of the bill.

**Topics:** open source, llms, agents

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Read the original: https://the-decoder.com/deepseek-launches-an-improved-v4-pro-model-raises-api-prices-and-makes-its-agent-software-open-source/
Canonical: https://www.parallelquant.com/posts/deepseek-ships-v4-pro-open-sources-its-agent-tool-raises-api-prices-299133
Published by Parallel Quant — https://www.parallelquant.com