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HY4 Preview

20th on WebDev at 1631. Apache 2.0, marked preliminary.

Tencent · Apache 2.0 · Context 1M · $0.83 / $2.50 per million tokens · Fetched 2026-10-10

LMArena WebDev
1631
#23 / 153 · ±10
The Slop Index
55
#38 / 58
sudo L7
15.6%
#10 / 16

Benchmark scores

Boards older than 90 days are not counted as recommendations
BenchmarkSettingScoreRankCostAs of
LMArena WebDev—1631±10#23—2026-10-27
The Slop Index—55#38—2026-10-28
sudo L7High reasoning15.6#10—2026-10-28
Convex Evals1 run68.75#21$1.982026-10-28
SWE-bench Verified—This board has stopped updating——2026-02-26
Aider Polyglot—This board has stopped updating——2025-11-20

Use it or not

Why
  • Apache 2.0, three points behind MiMo Flash.
When not
  • Still preliminary, so the rank can move.

Appears in these scenarios

Collected from scenario boards
Build a Web frontend#10sudo L7 15.6%Build an Android app#10sudo L7 15.6%Write docs & copy#38Slop Index 55

Peers

ModelWebDevPrice $/M
HY4 PreviewCurrent1631$0.83 / $2.50Grok 4.71637$2 / $6MiMo V2.6 Flash1637$0.14 / $0.28Qwen3.8 Flash Next1628$0.16 / $0.47MiMo V2.6 Pro1625$0.43 / $0.87