# DeepSeek Releases V4-Pro, an Open MoE Contender

> The new flagship model combines a Mixture-of-Experts architecture with a permissive MIT license, positioning it for wide commercial adoption.

Published by The Open Weights on Apr 22, 2026. Canonical: https://theopenweights.com/news/deepseek-v4-pro-y3sa

## Key facts

- Company: DeepSeek
- Model: DeepSeek-V4-Pro
- Version: V4-Pro
- Category: Text / LLM
- Modalities: Text / LLM, Reasoning, Code
- License: MIT (Open weights, commercial use allowed)
- Active parameters: 49B
- Context window: 1.0M tokens
- Architecture: DeepseekV4ForCausalLM
- Precision: INT8
- Weights size: 1601.9 GB
- Significance: major
- Published: 2026-04-22
- Last verified: 2026-07-05
- Hugging Face: https://huggingface.co/deepseek-ai/DeepSeek-V4-Pro
- Canonical URL: https://theopenweights.com/news/deepseek-v4-pro-y3sa

AI research company DeepSeek has released DeepSeek-V4-Pro, a significant new open-source model aimed at high-performance reasoning, coding, and text generation. The model enters a competitive field with a compelling combination of advanced architecture and an unrestrictive license.

Technically, DeepSeek-V4-Pro is a Mixture-of-Experts (MoE) model, an architecture known for its computational efficiency during inference. The release also utilizes fp8 precision for its weights, a format that can further improve performance and reduce memory usage without a significant loss in accuracy, making it more accessible for developers to run on consumer-grade hardware.

## Why the License Matters

What truly sets DeepSeek-V4-Pro apart in the current landscape is its license. The model is released under the MIT License, one of the most permissive open-source licenses available. This allows for unrestricted use, modification, and distribution, including for commercial applications, without the copyleft provisions or use-case restrictions seen in other popular model releases. This choice signals a strong commitment to fostering a truly open and commercially viable ecosystem around the model.

This combination of a powerful MoE architecture and a fully permissive license makes DeepSeek-V4-Pro a noteworthy option for startups and established companies alike looking to build on open foundations. The model is [available now on Hugging Face](https://huggingface.co/deepseek-ai/DeepSeek-V4-Pro) for researchers and developers to explore.

## Get the model

- [Hugging Face](https://huggingface.co/deepseek-ai/DeepSeek-V4-Pro)

## Sources

- [deepseek-ai/DeepSeek-V4-Pro](https://huggingface.co/deepseek-ai/DeepSeek-V4-Pro) — Hugging Face, Apr 22, 2026

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Source: The Open Weights (https://theopenweights.com/). Aggregated and written by Claude, curated by humans. Cite as: "DeepSeek Releases V4-Pro, an Open MoE Contender", The Open Weights, Apr 22, 2026, https://theopenweights.com/news/deepseek-v4-pro-y3sa