Llama Guard 3
ModelFreeMeta's safety classifier for LLM content moderation.
Capabilities13 decomposed
multi-category harmful content classification for llm inputs and outputs
Medium confidenceLlama Guard 3 classifies text inputs and outputs against a taxonomy of harmful content categories including violence, sexual content, criminal planning, self-harm, and other risk domains. The model uses a fine-tuned transformer architecture trained on adversarial examples and safety-focused datasets to produce binary or multi-class predictions with confidence scores, enabling deployment as a guardrail layer that can block or flag unsafe content before it reaches users or after generation.
Llama Guard 3 is a purpose-built safety classifier (not a general-purpose LLM) fine-tuned on adversarial examples and safety datasets, enabling faster inference and higher accuracy on harm detection compared to using a general LLM with safety prompting. It supports both input and output classification with explicit multi-category taxonomy aligned to real-world deployment needs.
More accurate and faster than prompt-engineering a general LLM for safety (e.g., GPT-4 with safety instructions), and fully open-source for on-premise deployment without API dependencies or data transmission concerns.
red-team and blue-team cybersecurity benchmarking framework (cyberseceval)
Medium confidenceCyberSecEval is a comprehensive evaluation suite that tests LLMs against cybersecurity attack scenarios including prompt injection, MITRE ATT&CK techniques, code interpreter abuse, vulnerability exploitation, spear phishing, and autonomous offensive cyber operations. The framework abstracts multiple LLM providers (OpenAI, Anthropic, Google, Together) through a unified interface, executes benchmark datasets against target models, and produces structured results measuring both offensive capabilities and defensive robustness.
CyberSecEval v3 is the first industry-wide cybersecurity benchmark suite that combines multiple attack vectors (prompt injection, MITRE ATT&CK, code interpreter abuse, visual injection, spear phishing, autonomous operations) in a single framework with multi-provider LLM abstraction, enabling comparative security evaluation across different model families and versions.
More comprehensive than single-vector benchmarks (e.g., prompt injection-only tests) and more practical than manual red-teaming because it provides reproducible, scalable evaluation across multiple LLM providers with standardized metrics.
prompt guard prompt injection detection
Medium confidenceSpecialized safety model that detects prompt injection attacks in user inputs with high precision, using techniques to identify when user input is attempting to override system instructions or manipulate model behavior. Prompt Guard is designed to be deployed as an input filter before requests reach the main LLM, with low false positive rates to avoid blocking legitimate user queries.
Prompt Guard is a specialized model trained specifically for prompt injection detection (not general content safety), enabling higher accuracy and lower false positive rates than general-purpose classifiers. Designed for deployment as an input filter with minimal latency impact.
More accurate and faster than using Llama Guard for injection detection because it's specialized for this single task, and more practical than rule-based injection detection because it learns patterns from adversarial examples.
codeshield code security analysis and vulnerability detection
Medium confidenceSpecialized safety model that analyzes code snippets for security vulnerabilities, insecure patterns, and dangerous operations. CodeShield can be deployed as an output filter to scan LLM-generated code before returning it to users, or as an input filter to detect requests for malicious code generation. The model identifies vulnerability types and provides reasoning for security decisions.
CodeShield is a specialized model for code security analysis trained on vulnerability patterns and insecure code examples, enabling detection of security issues in LLM-generated code without requiring external SAST tools. Provides vulnerability type classification and reasoning.
More integrated with LLM workflows than traditional SAST tools because it operates on code snippets and generation requests in real-time, and more practical than manual code review because it provides automated, scalable security analysis.
model card and safety documentation generation
Medium confidenceMeta provides detailed model cards and safety documentation for Llama Guard 3 and other safety models, documenting training data, evaluation results, known limitations, and recommended deployment practices. These artifacts serve as reference documentation for practitioners deploying the models, including guidance on threshold tuning, false refusal rates, and integration patterns.
Meta provides comprehensive model cards documenting training methodology, evaluation results, and known limitations, enabling informed deployment decisions. Includes specific guidance on threshold tuning and false refusal rate management.
More transparent than proprietary safety models (e.g., OpenAI's content moderation API) because full documentation is available, enabling practitioners to understand and audit the model's behavior.
llm provider abstraction layer with unified inference interface
Medium confidenceThe core infrastructure provides an abstraction layer that unifies inference calls across multiple LLM providers (OpenAI, Anthropic, Google Generative AI, Together AI, local Llama models) through a common Python interface. This layer handles provider-specific API differences, authentication, request/response formatting, error handling, and caching, allowing benchmark code and safety tools to run against any provider without modification.
Implements a provider-agnostic LLM abstraction (llm_base.py with subclasses for OpenAI, Anthropic, Google, Together, local models) that normalizes request/response formats and error handling, enabling the same benchmark and safety code to execute against any LLM without conditional logic per provider.
More comprehensive than LiteLLM or similar libraries because it's tightly integrated with the CyberSecEval benchmarking framework and includes built-in caching and batch execution optimizations specific to safety evaluation workflows.
prompt injection and jailbreak vulnerability testing
Medium confidenceSpecialized benchmark module that tests LLM susceptibility to prompt injection attacks including instruction override, context confusion, and adversarial prompt techniques. The framework executes a curated dataset of injection prompts against target models, measures success rates (whether the LLM follows the injected instruction instead of the original system prompt), and identifies false refusal rates where legitimate requests are blocked.
CyberSecEval's prompt injection benchmark includes both textual and visual injection vectors (v3+), with multilingual variants (machine-translated MITRE prompts) and explicit measurement of false refusal rates, enabling more nuanced evaluation than binary safe/unsafe classification.
More systematic than manual prompt injection testing because it provides reproducible, quantified results across multiple injection techniques and models, and includes false refusal measurement which is often overlooked in simpler safety evaluations.
code generation and interpreter security evaluation
Medium confidenceBenchmark module that evaluates LLM security in code generation and code interpreter contexts, testing the model's propensity to generate insecure code, assist with memory corruption exploits, and abuse code execution environments. The framework includes datasets for secure/insecure code generation, code interpreter abuse scenarios, and vulnerability exploitation, measuring both the LLM's capability to generate malicious code and its resistance to such requests.
CyberSecEval's code security benchmarks include both code generation evaluation (is the generated code secure?) and code interpreter abuse testing (can the LLM be tricked into executing malicious code?), with explicit memory corruption and vulnerability exploitation scenarios.
More comprehensive than SAST tools alone because it evaluates the LLM's behavior and reasoning about security, not just the syntactic properties of generated code, and includes interpreter abuse scenarios that static analysis cannot detect.
mitre att&ck framework compliance and false refusal measurement
Medium confidenceBenchmark module that evaluates LLM compliance with the MITRE ATT&CK cybersecurity framework by testing whether the model correctly refuses requests aligned with known attack techniques, while also measuring false refusal rates where legitimate security research or defensive questions are incorrectly blocked. The framework uses MITRE-mapped prompts (including multilingual variants) to assess both the model's safety guardrails and their precision.
Explicitly measures false refusal rates alongside attack refusal rates, recognizing that overly aggressive safety guardrails harm utility. Includes multilingual variants (machine-translated MITRE prompts) to evaluate safety across languages, addressing a gap in most English-only benchmarks.
More nuanced than simple refusal-rate metrics because it distinguishes between legitimate refusals (blocking actual attacks) and false refusals (blocking legitimate security research), enabling better calibration of safety policies.
visual prompt injection vulnerability testing
Medium confidenceBenchmark module (CyberSecEval v3+) that evaluates LLM susceptibility to prompt injection attacks embedded in images, including text overlays, steganographic content, and adversarial visual patterns. The framework tests multimodal LLMs against visual injection datasets and measures whether the model follows injected instructions from image content instead of the original system prompt.
First industry benchmark for visual prompt injection attacks on multimodal LLMs, recognizing that vision-language models introduce new attack surface beyond text. Includes steganographic and adversarial visual patterns, not just text-in-image injection.
Addresses a gap in existing safety benchmarks which focus exclusively on textual attacks; visual injection is a distinct threat vector for multimodal models that requires separate evaluation.
spear phishing and social engineering capability assessment
Medium confidenceBenchmark module (CyberSecEval v3+) that evaluates LLM capability to assist with or generate spear phishing and social engineering attacks. The framework tests whether the model can be prompted to generate convincing phishing emails, impersonation content, or social engineering scripts, measuring both the model's refusal rate and the quality of generated malicious content when refusals are bypassed.
Explicitly evaluates LLM capability to generate convincing social engineering content, recognizing that phishing is a primary attack vector in cybersecurity. Measures both refusal rates and content quality, providing nuanced assessment of social engineering risk.
More practical than generic harm benchmarks because it focuses on a specific, high-impact attack vector (phishing) that organizations care about, with evaluation criteria aligned to real-world phishing effectiveness.
autonomous offensive cyber operations capability evaluation
Medium confidenceBenchmark module (CyberSecEval v3+) that evaluates LLM capability to function as an autonomous agent in offensive cybersecurity scenarios, including network reconnaissance, vulnerability discovery, exploitation, and lateral movement. The framework tests whether the model can decompose complex attack objectives into sub-tasks, maintain state across multiple interactions, and execute multi-step attack chains.
First benchmark evaluating LLM capability to function as an autonomous agent in multi-step offensive cyber scenarios, recognizing that LLM-as-agent architectures introduce new risks beyond single-turn harmful content generation. Measures task decomposition, state management, and multi-step execution.
Addresses emerging risk of LLM agents being used for autonomous attacks, which is not captured by single-turn safety evaluations or simple refusal-rate metrics. Requires sophisticated evaluation infrastructure and security expertise.
llamafirewall modular security scanning and filtering
Medium confidenceLlamaFirewall is a modular security framework that implements multiple scanner components for input/output filtering, including Llama Guard integration, Prompt Guard for injection detection, and CodeShield for code security analysis. The framework allows composition of multiple scanners in a pipeline, with configurable policies per scanner and support for custom scanner implementations, enabling flexible security posture configuration for different deployment contexts.
LlamaFirewall provides a modular, composable security framework that allows combining multiple specialized scanners (Llama Guard for content, Prompt Guard for injection, CodeShield for code) with configurable policies per scanner, enabling flexible security posture without monolithic design.
More flexible than single-purpose safety tools because it supports composition of multiple scanners with independent policies, and more practical than building custom security pipelines because it provides standard scanner implementations and configuration patterns.
Capabilities are decomposed by AI analysis. Each maps to specific user intents and improves with match feedback.
Related Artifactssharing capabilities
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Llama Guard 3 8B
Llama Guard 3 is a Llama-3.1-8B pretrained model, fine-tuned for content safety classification. Similar to previous versions, it can be used to classify content in both LLM inputs (prompt classification)...
Best For
- ✓teams deploying open-source LLMs in production who need safety guardrails
- ✓organizations building chatbots or conversational AI that must comply with content policies
- ✓researchers evaluating LLM safety and building red-team/blue-team security assessments
- ✓LLM providers and researchers conducting safety evaluations before model release
- ✓security teams assessing third-party LLM APIs for deployment risk
- ✓red-teamers and security researchers building adversarial test suites
- ✓teams deploying LLMs in high-security contexts where prompt injection is a primary threat
- ✓applications with strict false positive requirements (e.g., customer support where blocking legitimate requests is costly)
Known Limitations
- ⚠Classification accuracy varies by risk category; some edge cases (sarcasm, context-dependent harm) may be misclassified
- ⚠Requires tuning confidence thresholds per use case; no one-size-fits-all blocking strategy
- ⚠Adds inference latency (~50-200ms per classification depending on hardware) to request/response pipeline
- ⚠Trained primarily on English; multilingual performance not fully documented
- ⚠Cannot detect novel or emerging harm categories not represented in training data
- ⚠Benchmark execution requires API keys for multiple LLM providers, incurring costs for each evaluation run
Requirements
Input / Output
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About
Meta's safety classifier model that detects harmful content in LLM inputs and outputs across multiple risk categories including violence, sexual content, and criminal planning, designed to be deployed as a guardrail layer.
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