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Open Source Models

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Monday, 6 July 2026

tencent/Hy3

Simon Willison's Weblog 1 month ago 18 ● 2 sources

Tencent released Hy3, a 295-billion-parameter mixture-of-experts model under Apache 2.0 license, following feedback from 50+ products that used its April preview version. The model uses 21 billion active parameters and supports a 256,000-token context length, with the full version requiring 598GB storage and a quantized version at 300GB. The model is available free on OpenRouter until July 21st and competes with open-source models having 2-5 times more parameters.

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Open Source Models Mixture-of-Experts

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