Hunyuan API

The Hunyuan API is how you call Tencent's Hunyuan models, now branded HY: the Hy3 language model and a Hy4 preview, plus vision and translation models on the mainland site. Internationally they're sold through TokenHub, Tencent Cloud's model service, which also serves DeepSeek, GLM, Kimi and MiniMax models under the same account. Tencent's older standalone Hunyuan console on its mainland China cloud no longer takes new purchases.

Every TokenHub model accepts both the OpenAI Chat Completions format and the Anthropic Messages format, so you use the official OpenAI or Anthropic SDKs by swapping the base URL and key. Each region has its own endpoint: https://tokenhub-intl.tencentcloudmaas.com/v1 for Singapore, https://tokenhub-us.tencentcloudmaas.tech/v1 for Silicon Valley, and https://tokenhub.tencentcloudmaas.com/v1 for Guangzhou in mainland China. Hy3 is called as hy3.

Useful for a small team: one key covers Tencent's models and several other Chinese model families; Hy3 is published as open weights on Hugging Face under Apache 2.0, so you can serve it yourself; and Token Plan subscriptions are sold alongside pay-per-token billing.

Limits: Tencent, based in Shenzhen, processes data in the service region you select, but its data processing agreement lets it process data outside that region for operational, regulatory or other reasons. Prices also differ by region, so choose one before you build.