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Models/deepseek-v4-flash

DeepSeek V4 Flash

20th on DeepSWE v1.1 Best (max) at 53.3%, about $0.10 mean per task.

DeepSeek · Proprietary · Fetched 2026-10-10

LMArena WebDev
1582
#40 / 153 · ±9
The Slop Index
72
#5 / 58
Convex Evals
32.14%
#34 / 41

Benchmark scores

Boards older than 90 days are not counted as recommendations
BenchmarkSettingScoreRankCostAs of
LMArena WebDevhigh1582±9#40—2026-10-27
The Slop Index—72#5—2026-10-28
Convex Evals1 run32.14#34$0.037942026-10-28
DeepSWE v1.1max · mini-swe-agent53.349.8–56.9#20$0.102026-09-22
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
  • Among the cheapest DeepSWE rows at the mid-board.
When not
  • Behind V4 Pro on pass rate, and a different row from V4.1 Flash.

Appears in these scenarios

Collected from scenario boards
Build a Web frontend#20DeepSWE 53.3%Build an Android app#20DeepSWE 53.3%Write CLI, scripts, and DevOps#20DeepSWE 53.3%Write docs & copy#5Slop Index 72

Peers