As Simon Willison notes, the sheer size of Hy3—nearly 600GB for the full model—makes its 'open-source' label somewhat academic for most developers. The more significant development may be its temporary free availability on OpenRouter, which serves as a clever distribution and stress-testing tactic. This release appears to be part of a broader pattern where Chinese tech giants, facing export restrictions, are leveraging open-source communities for global benchmarking and influence. The key watchpoint is whether the claimed efficiency gains translate into tangible adoption outside Tencent's own ecosystem, or if it remains a trophy model for the leaderboard.
ModelsCommentary
Tencent releases Hy3, a large Chinese open-source MoE model, reports say
The 295B-parameter model is said to outperform similar-sized rivals and is available for free testing on OpenRouter.
AIpressr commentary on an article originally published by Simon Willison.
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Read the original article at simonwillison.net →Source: Simon Willison, simonwillison.net — Jul 6, 2026
“Hy3 is a 295B-parameter Mixture-of-Experts (MoE) model with 21B active parameters and 3.8B MTP layer parameters, developed by the Tencent Hy Team.”
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