DeepSeek V4.1 Flash
Open weights on Hugging Face (deepseek-ai/DeepSeek-V4.1-Flash-1017). Strongest open-weight model on GoBench, but slow there (140-170 s/move in Max).
- Vendor
- DeepSeek
- Kind
- llm
- Tier
- mid
- Weights
- open
- Released
- 2026-10
- Context
- 1,049k tokens
Our Go rating
Not rated yet: ratings come from tournament games against bots of known strength. See the leaderboard.
Games here
No published game yet.
Benchmarks
| Measure | Value | Unit | As of | Source |
|---|---|---|---|---|
| LMArena text (0910, Max) | 1,475 | Elo | 2026-11 | LMArena (arena.ai) Text leaderboard, page dated 2026-11-09 |
| Artificial Analysis Intelligence Index (1017, max) | 33 | index points | 2026-11 | Artificial Analysis Intelligence Index (current version, composite of |
Other games
| Measure | Value | Unit | As of | Source |
|---|---|---|---|---|
| GoBench 9x9 Track 1, no tools (0910, Max), ±206 | 1,707 | Elo (GoBench scale) | 2026-11-03 | GoBench (Roland Gao): LLMs play full 9x9 games vs calibrated KataGo le |
| GoBench 9x9 Track 1, no tools (1017, Max), ±195 | 1,634 | Elo (GoBench scale) | 2026-11-03 | GoBench (Roland Gao): LLMs play full 9x9 games vs calibrated KataGo le |
| GoBench 9x9 Track 1, no tools (0910, High), ±205 | 1,380 | Elo (GoBench scale) | 2026-11-03 | GoBench (Roland Gao): LLMs play full 9x9 games vs calibrated KataGo le |
| LLM Chess (0910, high), ±181 | 1,087 | Elo (chess.com-anchored) | 2026-11-05 | LLM Chess (Saplin) Elo vs random player and Komodo Dragon, chess.com-a |
How we run it
- needs-key
openrouter·deepseek/deepseek-v4.1-flash-1017— 1017 snapshot; deepseek/deepseek-v4.1-flash = 0910 snapshot - untested
opencode·opencode/deepseek-v4.1-flash-free— free opencode model; another free opencode/* model hung on 2026-11-07