DeepSeek V4.1 Flash
ECI#32
156DeepSeek V4.1 Flash is an open-weights model from DeepSeek, released September 9, 2026. It has an ECI score of 156 and ranks 32nd of 253 tracked models. At the time of its release, it ranked 24th of 242 tracked models.
DeepSeek V4.1 Flash vs select alternatives
| Domain | Benchmark | DeepSeek V4.1 Flash | |||
|---|---|---|---|---|---|
ECI scoreBest score 169 | 156 | 156 | 156 | 157 | |
| Ranking | #32 | #34 | #31 | #29 | |
| Conceptual reasoning | ARC-AGI-2Best score 95% | ||||
| Games | Chess PuzzlesBest score 76% | ||||
Mystery Game PuzzlesBest score 84% | |||||
| Mathematics | FrontierMath Tiers 1-3 (v2)Best score 94% | ||||
FrontierMath Tier 4 (v2)Best score 100% | |||||
OTIS Mock AIME 2024-2025Best score 100% | |||||
| Multimodal | Furniture Assembly BenchmarkBest score 83% | ||||
| Science | GPQA DiamondBest score 96% | ||||
| World knowledge | SimpleQA VerifiedBest score 76% |
