Hy4 Preview

Tencent: Hy4 preview is a mixture-of-experts model from Tencent, with 49B active parameters out of 770B total.

Context
1M
Max output
64K
Input price
$0.83/1M tokens
Output price
$2.5/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming

Details

Model IDtencent/hy4-preview
Provider Novita AI
Creator tencent
Family—
License—
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weight—
Parameters—
Architecture—
Context window1M tokens
Max input—
Max output64K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.novita.ai/v3/openai/v1/chat/completions

Pricing

Input
$0.83
Output
$2.5
Cache write
—
Cache read
—
Batch in
—
Batch out
—

API

GET/v1/models/novita/tencent/hy4-preview

Hy4 Preview

tencent/hy4-preview

Tencent: Hy4 preview is a mixture-of-experts model from Tencent, with 49B active parameters out of 770B total.

Changes · 3 entries
tencent/hy4-previewcreateca7a400Nov 2, 2026, 03:02 AM
tencent/hy4-previewupdate3170597Sep 19, 2026, 06:34 AM
context_window1048576→1000000
tencent/hy4-previewcreate2ae168fSep 18, 2026, 06:37 AM