DeepSeek V4.1 Flash
ECI#32
155DeepSeek V4.1 Flash is an open-weights model from DeepSeek, released September 9, 2026. It has an ECI score of 155 and ranks 32nd of 257 tracked models. At the time of its release, it ranked 27th of 251 tracked models.
DeepSeek V4.1 Flash vs select alternatives
| Domain | Benchmark | DeepSeek V4.1 Flash | |||
|---|---|---|---|---|---|
ECI scoreBest score 167 | 155 | 154 | 155 | 155 | |
| Ranking | #32 | #35 | #29 | #33 | |
| Agent | APEX-AgentsBest score 88% | ||||
| Conceptual reasoning | LMCABest score 68.2 | 47.0 | 41.7 | 45.5 | 48.4 |
DTBenchBest score 99% | |||||
| Mathematics | ProofBenchBest score 100% | ||||
| Multimodal | GDP.pdfBest score 34% | ||||
| Science | CritPtBest score 32% | ||||
SciCodeBest score 67% | |||||
| Software engineering | Text Arena (Coding)Best score 1820 | 1614 | 1580 | 1581 | 1534 |
ALE-BenchBest score 2951 | 1092 | 1306 | 1403 | — |
