DeepSeek V4.1 Flash 1017

Top tier

size 1M free on 2 of 2 routes Checked by live call

#1 open model on the Arena WebDev leaderboard with 1,670 points. This is the 17 Oct 2026 build.

Same as Top of the open field

Made by DeepSeek

About

DeepSeek V4.1 Flash 1017 is DeepSeek's checkpoint from 17 Oct 2026, released under the MIT license. It ranks first among open models on the Arena Code Arena WebDev board with 1,670 points, twelfth overall. It is ahead of Kimi K3 Max on that board. The free route is NVIDIA Build.

Best for

Writing code
Web and front-end builds
Working to tight token budgets

Scores on record

Arena WebDev1670 pts
DeepSWE v1.177.0%
Terminal-Bench 4.042.3

All routes

NVIDIA Build

hosted API Live

Free through NVIDIA Build. NVIDIA lists the base V4.1 Flash; the 1017 build is not listed on its own.

Last checked 27 Oct 2026 at 11:10 IST

Use it free in 1 minute

Open NVIDIA Build.
Sign in, or ask us and we will walk you through it.
Pick the model and send a test message.
If it asks for a key, add yours in place of YOUR_KEY.

OpenCode Zen

deepseek-v4.1-flash-free Live

Free on OpenCode Zen for a limited time.

Last checked 27 Oct 2026 at 11:10 IST

Use it free in 1 minute

provider: opencode
model: deepseek-v4.1-flash-free

Add that to your OpenCode config, then pick the model in the model list.

History

71 of 72 checks passed, 1 failed · live call checks, first one 21 Oct 2026 · last 20 shown

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Each mark is one check we actually ran; the time is when it ran. A hollow mark is a failed check. No mark means no check in the log.