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Models/deepseek-v4-1-flash

DeepSeek V4.1 Flash

New WebDev tier 20261017 (max) at #13 with 1664; prior tier 20260910 (max) at #26 with 1618. On Image-to-WebDev, 20260910 (max) is #13 at 1606. MIT.

DeepSeek · MIT · Context 1M · $0.30 / $1.20 per million tokens · Fetched 2026-10-20

LMArena WebDev
1665
#16 / 153 · ±8
LMArena Image-to-WebDev
1606
#13 / 65 · ±22
The Slop Index
59
#28 / 58

Benchmark scores

Boards older than 90 days are not counted as recommendations
BenchmarkSettingScoreRankCostAs of
LMArena WebDevmax1665±8#16—2026-10-27
LMArena Image-to-WebDevmax1606±22#13—2026-10-19
The Slop Index—59#28—2026-10-28
EQ-Bench Creative Writing v3—1539.9#62—2026-10-29
Convex Evals5 runs67.68#23$0.106862026-10-28
FrontierCodemax · chisel19.3#17$0.3842026-10-27
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
  • MIT. The 20261017 tier is inside the WebDev top fifteen.
When not
  • Do not merge the two rows into one score. No front-of-board Terminal or Android score either.

Appears in these scenarios

Collected from scenario boards
Build a Web frontend#13Image-to-WebDev 1606Build an Android app#17FrontierCode 19.3%Write CLI, scripts, and DevOps#17FrontierCode 19.3%Write docs & copy#28Slop Index 59

Appears in these builds

Build a Web frontend with this setClaude Opus 5.5 + frontend-design + shadcn/ui + Phosphor Icons + Motion + Geist + Figma MCP server→

Peers