How to Install / Upgrade: Tencent's Apache-licensed Hy3 takes on GLM-5.2 at half the size — and wins everywhere…

Tencent released Hy3 under an Apache license, providing an open-weight model at half the size of GLM-5.2 that outperforms GLM-5.2 everywhere except coding. Previously, many strong Chinese open-weight model releases included license terms that excluded the European Union, the United Kingdom, and South Korea. Those territorial exclusions led legal teams to halt deployments for enterprises headquartered in those regions or serving traffic into them.

To upgrade to Hy3, IT and engineering teams must replace restricted open-weight models with Hy3 for workloads serving traffic in the European Union, the United Kingdom, and South Korea under its Apache license. Teams upgrading from GLM-5.2 should migrate general non-coding workloads to Hy3 to leverage performance wins at half the model size. Deployments handling coding tasks should retain GLM-5.2 rather than migrating to Hy3.

A key gotcha is that Hy3 loses to GLM-5.2 in coding performance, making coding tasks an exception to its performance wins. Verification requires IT and legal teams to confirm that deployments serving the European Union, United Kingdom, and South Korea operate under the Apache license terms. Engineering teams can verify successful upgrades by completing model evals on non-coding tasks to confirm Hy3 beats GLM-5.2 at half the size.