Why AI Models Disagree About Security Vulnerabilities in Code

Gabriel Bonami — Thu, 09 Jul 2026 14:22:19 +0000

Developers are increasingly using AI to analyze code, detect bugs, and even identify security vulnerabilities. Tools powered by large language models promise faster development and automated security insights.
But during testing, we discovered something surprising.
When we analyzed the same code with three different AI models — OpenAI, Claude, and Gemini — the vulnerability reports often looked completely different.

Sometimes one model flagged a critical security issue while the other two did not detect anything. In other cases, two models agreed while the third suggested a completely different fix.
This inconsistency raises an important question:
Which AI model should developers trust when it comes to security?
The Problem with Single-Model Analysis
Most AI security tools rely on a single model. This approach introduces two major issues:
• False positives that waste developer time
• Missed vulnerabilities that create real risk
If the model is wrong, developers either fix problems that do not exist or miss issues that could become serious security vulnerabilities.
Testing Multiple AI Models
We ran several experiments using identical code samples containing known vulnerabilities.
Each model analyzed the code independently.
The results showed clear disagreement between the models in many cases.
However, when two or more models identified the same vulnerability, the likelihood that the issue was real increased significantly.
This observation led to a new idea.

A Consensus-Based Approach
Instead of relying on a single AI model, we built a system that runs multiple models simultaneously and compares their findings.
This approach allows us to highlight vulnerabilities confirmed by more than one model and reduce the noise caused by isolated warnings.
The system also provides several suggested fixes generated by the models. Developers can review the options and choose the fix that best fits their codebase.
Introducing Kodix Security
Kodix Security is a platform that analyzes code using multiple AI models and generates a single consensus-based vulnerability report.
Key features include:
• multi-model analysis (OpenAI, Claude, Gemini)
• reduced false positives through consensus detection
• multiple fix suggestions for each vulnerability
• a learning remediation engine that improves over time
When developers choose a fix and it successfully resolves the vulnerability, the platform learns from that decision to improve future recommendations.
Over time this creates a cross-model dataset of vulnerability detection and remediation patterns.
Why This Matters
AI is becoming an essential tool for developers, but relying on a single model can produce inconsistent results.
A consensus approach helps increase confidence in vulnerability detection while keeping developers in control of the final decision.
If you're interested in testing the platform, you can try it here:
KodixSecurity.com
We’re currently gathering feedback from developers and security engineers to improve the system.

DEV Community: Gabriel Bonami

Why AI Models Disagree About Security Vulnerabilities in Code