# Supercov vs DeepSeek security agents

> DeepSeek agents are cheaper and a little more accurate; Supercov answers in 10 seconds. Measured on 72 vulnerable repositories, by language.

Web page: https://supercov.com/compare/security/deepseek · Published 2026-09-25
All Supercov pages for agents: https://supercov.com/llms.txt · Full text: https://supercov.com/llms-full.txt

## The difference

RealVuln ran three DeepSeek models as agents that read a repository and report
vulnerabilities. They are the cheapest AI scanners in the test, and the V4
Flash agent is cheaper than Supercov. Supercov is faster: seconds rather
than minutes.

## Results

72 deliberately vulnerable repositories, 2,016 labelled vulnerabilities.

| | Supercov 2.0.1 | DeepSeek V4 Flash | DeepSeek V4.1 Flash | DeepSeek V4 Pro |
| --- | ---: | ---: | ---: | ---: |
| F1 | 0.42 | 0.48 | 0.51 | 0.46 |
| Finds | 43% | 41% | 50% | 37% |
| Right | 42% | 59% | 53% | 63% |
| Median time | 10 s | 2.6 min | 1.6 min | 3.8 min |
| Cost per repository | 5¢ | 2¢ | not recorded | 7¢ |

Supercov finds more than V4 Flash and V4 Pro, but they are right more often,
so their F1 is higher.

## By language

| F1 | Supercov | V4 Flash | V4.1 Flash | V4 Pro |
| --- | ---: | ---: | ---: | ---: |
| Python, 32 repositories | 0.54 | 0.62 | 0.64 | 0.61 |
| TypeScript, 27 | 0.36 | 0.40 | 0.42 | 0.34 |
| JavaScript, 13 | 0.34 | 0.35 | 0.43 | 0.39 |

On TypeScript, Supercov is ahead of V4 Pro.

## Choose a DeepSeek agent when

- cost matters most and a few minutes per repository is fine;
- you are comfortable running an agent harness around the model yourself.

## Choose Supercov when

- your agent should check every change without waiting minutes;
- you want one command with no harness to build or maintain;
- you want the same checks every run, so a new finding means the code changed.

See [Accuracy, speed and cost](https://supercov.com/docs/security-benchmark.md) for how this was measured.


Evidence: [every scanner's results (JSON)](https://supercov.com/downloads/security-benchmark-2026-09-25.json) · [Supercov's reports, timings and scoring script (ZIP)](https://supercov.com/downloads/supercov-security-benchmark-2026-09-25.zip). Measured September 25, 2026 on 72 RealVuln repositories.