Tencent
Tencent: Hy4 preview
tencent/hy4-preview
Tencent: Hy4 preview is a mixture-of-experts model from Tencent, with 49B active parameters out of 770B total. It is designed for coding agents, complex tool-use workflows, and productivity tasks that require planning, context continuity, and sustained multi-step execution.
Input
$0.834
/ 1M tokens
Output
$2.501
/ 1M tokens
Context window
1.05M
tokens
Limits
Context
1,048,576
tokens
Max output
64,000
6.1% of the context window
Parameters
779,960,992,733
Model facts
Author
Tencent
Tokenizer
Other
Modality
Text -> Text
License
Apache-2.0
Created
Aug 28, 2026
Hugging Face
tencent/Hy4-preview
Reasoning
Default HighHighLowNone
Publication status
Hugging Face: verifiedLicense: publishedParameter count: published
Modalities
Input · TextOutput · Text
Generation controls
Frequency penaltyInclude reasoningLogit biasMax completion tokensMax tokensMin pPresence penaltyReasoningReasoning effortRepetition penaltyResponse formatSeedStopStructured outputsTemperatureTool choiceToolsTop kTop p