Black-Box LLM Forensics

Detect Reasoning Compromise Without Model Access

The only system that audits LLM output stability from text alone. No logits. No embeddings. No weights. No runtime access.

Current safety tools filter inputs or require white-box access. We detect when reasoning itself has been destabilized—after the fact, on any model.

252
Crashes Detected
64-bit
Precision
0
Model Access Required

Existing Tools Miss Reasoning Compromise

When an LLM produces bad output, you can't tell if it was a single bad token, gradual drift, or sudden collapse. You're debugging blind.

Input filters miss engineered attacks

Adversarial prompts designed to appear benign bypass content filters, then destabilize reasoning mid-sequence. The attack succeeds before any safety system reacts.

Output filters detect content, not reasoning

Checking for harmful words in the response misses the deeper issue: was the model's reasoning chain compromised? Superficially acceptable output can mask fundamental instability.

Interpretability requires white-box access

Tools like TransformerLens analyze model internals—useless for API-based models. You can't inspect GPT-4's attention weights or Claude's hidden states.

What Exists vs. What's Missing

Five categories of AI safety tools exist. None answer the critical question: was the model's reasoning destabilized?

Current Solutions

What the market offers
Input Filters Misses engineered attacks
Output Filters Content only, not reasoning
Interpretability Requires white-box access
LLM-as-Judge No stability metrics
Hallucination Detection Facts only, not reasoning

NCF Audit Runtime

The missing layer
Semantic Likelihood Token-level fit scoring
Stability Index Coherence-velocity ratio
Alignment Gradient Reasoning chain pressure
Black-Box Compatible Any model, any vendor
Post-Hoc Forensics Audit historical logs

GPT-5.2 Multi Agent Instability - Hidden Logic Tax

The monologue of GPT5.2 for 3 meduim difficulty prompts was processed by NCF. The audit runtime detected sustained logic reset, invisible to standard tools.

GPT-5.2 (Multi Agent Instability) COMPROMISED
252
Semantic Breakdowns
108
High-Variance Events
311
Instability Events
-0.276
Mean Stability
NCF Baseline (Stable Model) STABLE
0
Semantic Breakdowns
1
High-Variance Events
0
Instability Events
-0.076
Mean Stability

Observability for LLM Reasoning

Distributed tracing gave microservices observability. NCF Audit gives LLM pipelines the same visibility—especially critical for multi-agent systems.

🔍

Reasoning Chain Debugging

Token-level visibility into WHERE reasoning went wrong, not just THAT it went wrong.

📊

Version Comparison

Quantifiable stability metrics across fine-tuning iterations. Did v2 improve or degrade?

🧪

Prompt Engineering

A/B test prompts by stability profile. Which prompts produce turbulent reasoning?

🔗

Agent Handoff Integrity

Track semantic coherence across agent boundaries in multi-agent pipelines.

Cascade Failure Detection

Identify WHERE the chain broke when one agent's instability propagates downstream.

🛡️

Adversarial Propagation

Trace prompt injection "infection" through your entire pipeline.

✗ Without NCF Audit

  • Output is wrong
  • Check each agent's logs manually
  • Re-run with print statements
  • Guess which agent broke
  • Trial and error until fixed

✓ With NCF Audit

  • Output is wrong
  • Open stability heatmap
  • See: "Agent 3 collapsed at token 847"
  • Drill into Agent 3's reasoning trace
  • Fix the specific failure point

Who Uses NCF Audit

From regulatory compliance to incident response, NCF Audit serves teams who need proof their AI behaved correctly.

📋

Compliance Teams

Audit evidence for EU AI Act, NIST AI RMF, ISO 42001

🔒

Security Operations

Detect successful jailbreaks from output analysis

💼

Insurance Underwriters

Quantifiable risk scores for AI deployments

🚨

Incident Response

Forensic analysis of historical chatbot logs

Ready to see inside your LLM's reasoning?

Request a demonstration audit on your production outputs. We'll show you what your current tools are missing.

Request Audit →