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HY4 Preview

18th on WebDev at 1632. Apache 2.0, marked preliminary.

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

LMArena WebDev
1632
#18 / 142 · ±10
The Slop Index
63
#12 / 39
sudo L7
11.1%
#10 / 12

Benchmark scores

Boards older than 90 days are not counted as recommendations
BenchmarkSettingScoreRankCostAs of
LMArena WebDev—1632±10#18—2026-10-08
The Slop Index—63#12—2026-10-11
sudo L7High reasoning11.1#10—2026-10-09
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, five 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 11.1%Build an Android app#10sudo L7 11.1%Write docs & copy#12Slop Index 63

Peers

ModelWebDevPrice $/M
HY4 PreviewCurrent1632$0.83 / $2.50MiMo V2.6 Flash1637$0.14 / $0.28Qwen3.8 Flash Next1633$0.16 / $0.47MiMo V2.6 Pro1629$0.43 / $0.87Muse Spark 1.31657$1.25 / $4.25