Hy4 Preview

Tencent's 770B-parameter mixture-of-experts model activates 49B parameters per token. It is built for coding agents and tool-heavy workflows that need planning, context continuity and sustained execution across a 1M-token window.

Provider: Tencent
Released: 2026-08-28
Parameters: 770B total / 49B active
Free API (OpenRouter): No
Per 1M tokens: $0.83 in · $2.501 out
Rival’s tab: $0.36; 58/58 receipts survived

Free API availability

No free endpoint for Hy4 Preview was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 9 Sep 2026OpenRouter usage limits

View API options

Get API accessProvider and language code samples

Provider

fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"tencent/hy4-preview"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Deep analysisPsychometrics, taste index, writing DNA

Writing DNA

Stylometric Fingerprint

Based on 27 text responses

Tick = global average

Vocabulary Diversity53%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length16.4 words

Average words per sentence.

Hedging0.43

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting5.9

**Bold** markers per 1,000 characters.

List Usage3.8

Bullet and numbered list items per 1,000 characters.

Section Structure0.67

Markdown headings per 1,000 characters.

Emoji Usage0.40

Emoji per 1,000 characters.

Transitions0.13

"However", "moreover", "furthermore" per 100 words.

Opening Habits

Consistency

75%

Across 27 responses

Favorites

Movie

Her

20137.8

Album

Kind of Blue

Miles Davis

Book

To Kill a Mockingbird

Harper Lee

City

Kyoto

Japan

Game

Minecraft

Action, Arcade4.4

Model Responses

53 outputs · $0.34 tracked across 53 receipts

Keep exploring

COMPARE

Hy4 Preview vs Ox Alpha

Real outputs compared side by side

RANKINGS

Best AI for Complex Reasoning

Sally's brothers, GPT-3 training FLOPs, a document editor syncing on client c...

Compare Hy4 Preview

Alternatives to Hy4 Preview

Hy4 Preview

Free API availability

Stylometric Fingerprint

Favorites

Model Responses

Hy4 Preview vs Ox Alpha

Best AI for Complex Reasoning

Compare Hy4 Preview

Alternatives to Hy4 Preview

Hy4 Preview

Free API availability

Stylometric Fingerprint

Favorites

Model Responses

Hy4 Preview vs Ox Alpha

Best AI for Complex Reasoning