Tencent’s November 4, 2026 release of Hy4 was a bid to move Hunyuan into the leading tier of Chinese open-weight AI models. The model adds image understanding and computer operation, and Tencent reported competitive results in selected coding, agent and browser-use comparisons. But the launch established a stronger contender—not a clear overall leader—and the final model weights were still pending.
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What Hy4 changes
Hy4 brings visual understanding and computer-use capabilities to the Hunyuan line for the first time. Tencent says it can analyze charts and images and operate command-line tools and graphical interfaces, extending the model beyond text-based interaction.
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At 770 billion total parameters, Hy4 is also substantially larger than the 295-billion-parameter Hy3 model described on Tencent’s Hunyuan site. Model size signals a change in scale, but does not by itself establish that a model is more capable than its competitors.
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A stronger position, based on selective comparisons
Tencent said Hy4 performed comparably to recent models from Moonshot AI, DeepSeek and Z.ai on tests spanning coding, agents and browser use. That is evidence for Tencent’s competitive claim in those tasks, not an independent demonstration that Hy4 leads across all uses. The supplied comparisons do not establish a head-to-head advantage over Alibaba’s Qwen models.
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In a financial-task evaluation reported by Tencent, 213 finance professionals scored 579 real-world tasks. Hy4 received 3.04 out of 4, compared with 2.97 for DeepSeek-V4.1-Flash-1017 and 2.68 each for Kimi K3.1 Pro and GLM-5.3. The result supports a narrow claim about performance in that evaluation; it should not be treated as a general ranking across AI tasks.
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The reliability figures need context
Reports give differing figures for Hy4’s internally measured hallucination rate. One account says it fell from 12.95% for the preview to 7.2%; Tencent’s Hunyuan research page gives a different comparison, from 15.76% to 5.45%. The supplied material does not explain the difference between these baselines, and both are internal results rather than independent evaluations.
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The market reaction was positive, but causation is uncertain
On November 5, Tencent shares rose 5.93% to HK$425.40, their highest level since October 16, according to reporting on the Hong Kong market. The move followed Hy4’s launch, but timing alone cannot show that the model announcement caused the rally.
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“Open” still depended on a promised release
At launch, Hy4 could be accessed through hosted services, but its weights were not yet publicly downloadable. Tencent said they would follow in the coming days, so the release initially offered access to the model without the same immediate ability to download and inspect its weights.
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That distinction matters when assessing Tencent’s position in the open-model field: Hy4’s capabilities and benchmark claims were public, while the promised weights and system card were still to come. The launch therefore marked a competitive step forward, but not yet a completed open-weight release.
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