One-line summary
On October 24, 2026 (early morning Beijing time; UTC October 23, 17:23), independent AI evaluator Artificial Analysis published its Cyber Index cybersecurity results: DeepSeek-V4.1-Flash-1017 (max setting) scored 57%, the highest of any publicly available model on this index measuring agentic cyber-defense capability.
Event Overview
- When: October 24, 2026, early morning Beijing time (UTC October 23, 17:23), published by Artificial Analysis (AA).
- Who: Artificial Analysis (independent AI evaluation lab); the evaluated model is DeepSeek's V4.1-Flash-1017 (the October 17, 2026 version).
- What: AA released Cyber Index results in which DeepSeek-V4.1-Flash-1017 (max) scored 57%, ranking first among the publicly available models covered by the index.
Key Information
| Item | Details |
|---|---|
| Evaluator | Artificial Analysis (AA) |
| Index | Cyber Index (measures agentic cyber-defense capability) |
| Publication time | October 24, 2026 early morning Beijing time (UTC Oct 23, 17:23) |
| Evaluated model | DeepSeek-V4.1-Flash-1017 (max setting) |
| Score | 57% |
| Ranking | First among publicly available models (top of the overall list) |
| Architecture | 552B-parameter MoE; 8B input / 16B output active parameters (official) |
Background and Impact
- DeepSeek officially released V4.1 Flash on September 10, 2026: a 552B-parameter MoE with an asymmetric Causal-Encoder-Decoder design (8B input activation, 16B output activation); API pricing is ¥1 per million input tokens and ¥4 per million output tokens off-peak (¥2/¥8 peak, cache-hit ¥0.02 off-peak).
- Cyber Index evaluates a model's ability to act as a cyber-defense agent (for example identifying and handling threats), distinct from general coding/reasoning benchmarks; the index focuses on "publicly available models," giving security teams a new selection dimension.
- Topping this index adds to DeepSeek-V4.1-Flash's case that a low-cost open-source model can also be used for security tasks; AA did not announce a schedule for future versions at publication time.