MODELS / TENCENT

Tencent Hy4 Preview

Tencent Hy4 preview is Tencent Hy’s open-source large language model, featuring 770B total parameters, 49B active parameters, and a context window exceeding 1 million tokens. Built for real-world productivity, it supports long-horizon coding, cross-document analysis, office…

TEXTREASONINGREASONINGTOOL-USEIMPLICIT-CACHING
1.0M
CONTEXT WINDOW
64K
MAX OUTPUT TOKENS
$0.834
INPUT PRICE / 1M TOKENS
$2.50
OUTPUT PRICE / 1M TOKENS
QUICKSTART

Call it in one request.

OpenAI-compatible: change the base URL, and the setup is complete.

curl https://enterprise.blackbox.ai/v1/chat/completions \
  -H "Authorization: Bearer $BLACKBOX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "blackboxai/tencent/hy4-preview",
    "messages": [{ "role": "user", "content": "Hello!" }],
    "stream": true
  }'
SPECIFICATIONS

The full spec sheet.

Context, pricing, modalities, routing, and deployment: everything Tencent Hy4 Preview supports, in one table.

MODEL ID
blackboxai/tencent/hy4-preview
DEVELOPED BY
Tencent
MODEL TYPE
Text
RELEASED
Aug 28, 2026
CONTEXT WINDOW
1.0M
MAX OUTPUT TOKENS
64K
INPUT MODALITIES
text
OUTPUT MODALITIES
text
INPUT PRICE
$0.834 / 1M tokens
OUTPUT PRICE
$2.50 / 1M tokens
CACHE READ
$0.042 / 1M tokens
REASONING
Supported
DATA RETENTION
Standard retention
DEDICATED DEPLOYMENT
Not available (closed-weight model)
SUPPORTED PARAMETERS
max_tokenstemperaturestoptoolstool_choicereasoninginclude_reasoning