Tencent releases Hy4 with vision and software control, promising weights within days
Prepared by Sintelligent with the help of SI. Published in SI: . Updated: .
Hy4 combines image analysis with actions in workplace software, but its open-source claim will become practical for independent developers once the weights are published.
The 770-billion-parameter model adds visual analysis, operation of graphical and command-line interfaces, and specialized training for Blender and CAD. Hy4 is already available in Tencent products and is beginning to roll out through third-party APIs. The company calls the release open source but plans to publish the weights and system cards in the coming days. In Tencent's internal evaluations, the hallucination rate fell from 12.95% in Hy4 Preview to 7.2%, while errors from unsupported assumptions dropped from 23.1% to 5.6%. In an assessment of 579 financial tasks involving 213 professionals, Hy4 scored 3.04 versus 2.97 for DeepSeek-V4.1-Flash-1017; these results came from Tencent's team, not an independent test.