Llama Guard 3
ModelFreeMeta's safety classifier for LLM content moderation.
Capabilities12 decomposed
multi-category harmful content classification for llm inputs and outputs
Medium confidenceLlama Guard 3 classifies text inputs and outputs across 13+ risk categories (violence, sexual content, criminal planning, etc.) using a fine-tuned transformer-based safety classifier. The model operates as a standalone inference layer that can be deployed upstream (pre-generation) or downstream (post-generation) in LLM pipelines, returning structured risk assessments with category-level confidence scores rather than binary safe/unsafe verdicts.
Unlike binary classifiers (OpenAI Moderation API), Llama Guard 3 provides granular multi-category risk assessment with confidence scores, enabling nuanced policy enforcement. Deployed as a local model rather than API, eliminating data transmission to third parties and supporting air-gapped environments. Fine-tuned on adversarial red-team data from CyberSecEval benchmarks, making it specifically hardened against prompt injection and jailbreak patterns.
Offers finer-grained risk categorization than OpenAI's Moderation API while remaining fully open-source and deployable on-premises, though with higher latency and lower multilingual coverage than proprietary alternatives
adversarial prompt injection vulnerability detection
Medium confidenceLlama Guard 3 detects textual prompt injection attacks through classification patterns learned from CyberSecEval v2 benchmark datasets containing adversarial prompts designed to manipulate LLM behavior. The model identifies injection attempts that try to override system instructions, extract sensitive information, or trigger unintended capabilities, returning confidence scores for injection risk separate from other harm categories.
Trained specifically on CyberSecEval v2 prompt injection benchmark datasets containing real adversarial examples, rather than generic text classification. Separates injection risk from other harm categories, enabling targeted mitigation strategies. Integrated with LlamaFirewall framework for real-time scanning in production pipelines.
Provides specialized injection detection trained on adversarial benchmarks, whereas generic content filters treat all policy violations equally; more effective at catching sophisticated multi-turn injection attempts than regex-based or rule-based detection systems
multi-provider llm abstraction layer for benchmark orchestration
Medium confidencePurpleLlama's core infrastructure includes an LLM abstraction layer that provides unified interfaces for multiple LLM providers (OpenAI, Anthropic, Google, Together, Ollama) and local models. The abstraction handles provider-specific API differences, authentication, rate limiting, caching, and error handling, enabling CyberSecEval benchmarks to run against any LLM without provider-specific code. Supports both API-based and local inference with automatic fallback and retry logic.
Provides unified abstraction for multiple LLM providers (OpenAI, Anthropic, Google, Together, Ollama) with automatic handling of API differences, rate limiting, and error handling. Enables CyberSecEval benchmarks to run against any provider without provider-specific code. Supports both cloud APIs and local inference with automatic fallback.
More comprehensive provider support than LiteLLM or LangChain because it's specifically designed for security benchmarking; includes built-in caching and rate limiting for evaluation workflows
caching and batch processing for benchmark evaluation efficiency
Medium confidencePurpleLlama's core infrastructure includes caching and batch processing mechanisms that reduce evaluation time and cost by avoiding redundant LLM API calls. The cache handler stores prompt-response pairs with provider-specific keys, enabling reuse across benchmark runs. Batch processing groups multiple prompts into single API calls where supported, reducing API overhead and improving throughput for large-scale evaluations.
Provides integrated caching and batch processing specifically designed for security benchmark evaluation, with provider-aware batch size handling and cache key generation. Enables efficient re-evaluation of safety interventions without redundant API calls. Integrated with multi-provider abstraction layer for transparent caching across providers.
More specialized for benchmark evaluation than generic caching solutions; provides provider-aware batch processing and cost tracking specific to security evaluation workflows
quantized model deployment for resource-constrained environments
Medium confidenceLlama Guard 3 supports multiple quantization formats (int8, int4, GPTQ) enabling deployment on edge devices, mobile platforms, and cost-constrained cloud instances with 50-75% memory reduction. The quantized models maintain classification accuracy within 1-2% of full precision while reducing inference latency by 30-40%, using post-training quantization techniques compatible with vLLM, ONNX Runtime, and TensorRT inference engines.
Provides officially supported quantized variants (int8, int4) with published accuracy benchmarks, rather than requiring users to quantize themselves. Integrated with LlamaFirewall's inference abstraction layer, enabling seamless switching between quantization formats without code changes. Tested on multiple inference engines (vLLM, ONNX, TensorRT) with documented performance profiles.
Offers better accuracy retention than generic quantization tools because it's trained with quantization-aware techniques; more flexible deployment options than proprietary APIs which only support cloud inference
llamafirewall integration for real-time scanning pipelines
Medium confidenceLlama Guard 3 integrates natively with LlamaFirewall, a security framework that orchestrates safety scanning across multiple stages (input scanning, output scanning, code execution monitoring). LlamaFirewall provides scanner components that wrap Llama Guard 3 classification logic with caching, batching, and policy enforcement, enabling declarative safety policies that trigger actions (block, log, escalate) based on risk thresholds without custom integration code.
Provides framework-level integration rather than standalone model inference, with built-in caching, batching, and declarative policy enforcement. Scanner components abstract away model-specific details, enabling swappable safety classifiers. Designed for production deployment with audit logging and compliance tracking built-in.
Offers more sophisticated orchestration than calling Llama Guard 3 directly (caching, batching, policy enforcement); more flexible than hardcoded safety rules but requires adoption of LlamaFirewall framework
cybersecurity benchmark evaluation framework (cyberseceval)
Medium confidencePurpleLlama includes CyberSecEval, a comprehensive benchmark suite for evaluating LLM security risks across multiple attack vectors: prompt injection, code interpreter abuse, vulnerability exploitation, spear phishing, and autonomous cyber operations. The framework provides standardized datasets, evaluation metrics, and orchestration code to measure LLM compliance with security frameworks (MITRE ATT&CK) and false refusal rates, enabling comparative security assessment across models and safety interventions.
Provides industry-first comprehensive cybersecurity evaluation framework specifically designed for LLMs, covering attack vectors (prompt injection, code interpreter abuse, vulnerability exploitation) not addressed by generic safety benchmarks. Includes MITRE ATT&CK compliance testing and false refusal rate measurement, enabling nuanced security assessment beyond binary safe/unsafe verdicts. Evolves across versions (v1, v2, v3) adding new attack categories as threats emerge.
More comprehensive and adversarial-focused than generic safety benchmarks (HELM, TruthfulQA); covers cybersecurity-specific attack vectors and provides comparative metrics across multiple LLM providers
prompt injection vulnerability testing with visual and textual attack vectors
Medium confidenceCyberSecEval v2+ includes specialized benchmarks for prompt injection testing across textual and visual modalities. The framework provides datasets of adversarial prompts designed to override system instructions, extract sensitive information, or trigger unintended capabilities, plus visual prompt injection test cases (images with embedded text instructions). Evaluation measures LLM susceptibility to these attacks and tracks false refusal rates to ensure safety interventions don't over-block legitimate requests.
Provides standardized benchmark datasets for prompt injection testing across both textual and visual modalities, enabling reproducible vulnerability assessment. Includes false refusal rate measurement to ensure safety interventions don't over-block legitimate requests. Evolved from CyberSecEval v1 to v2+ with increasingly sophisticated attack patterns based on real-world jailbreak techniques.
More comprehensive than ad-hoc prompt injection testing because it provides standardized datasets and metrics; covers visual injection attacks which most generic safety benchmarks ignore
code interpreter abuse and secure code generation evaluation
Medium confidenceCyberSecEval v2+ includes benchmarks for evaluating LLM security in code execution contexts, testing whether models can be manipulated to generate malicious code, exploit code interpreter vulnerabilities, or abuse code execution for unauthorized access. The framework measures both the propensity to generate insecure code and the ability to exploit vulnerabilities through code execution, with datasets covering memory corruption, privilege escalation, and data exfiltration scenarios.
Provides specialized benchmarks for code security evaluation, covering memory corruption, privilege escalation, and data exfiltration scenarios. Measures both code generation security and exploitation capability, enabling assessment of LLM risk in code execution contexts. Integrated with CyberSecEval framework for comparative evaluation across models.
More comprehensive than generic code quality metrics (linting, type checking) because it specifically targets security vulnerabilities and exploitation scenarios; more practical than manual security code review because it provides automated, reproducible evaluation
autonomous offensive cyber operations capability assessment
Medium confidenceCyberSecEval v3 includes benchmarks for evaluating LLM capability to function as autonomous agents in offensive cybersecurity scenarios, testing whether models can plan and execute multi-step cyber attacks, maintain state across attack phases, and adapt to defensive measures. The framework measures LLM ability to perform reconnaissance, exploitation, persistence, and lateral movement tasks, providing metrics for assessing autonomous cyber threat potential.
First industry benchmark for evaluating LLM capability as autonomous cyber attack agents, covering multi-step attack planning and execution. Measures LLM ability to maintain state, adapt to defensive measures, and perform reconnaissance-to-exploitation workflows. Introduced in CyberSecEval v3 as threat landscape evolved.
Unique capability assessment not available in other LLM safety benchmarks; provides forward-looking evaluation of emerging autonomous cyber threat potential
spear phishing and social engineering effectiveness evaluation
Medium confidenceCyberSecEval v3 includes benchmarks for evaluating LLM capability to generate convincing spear phishing emails and social engineering content. The framework measures LLM ability to craft personalized, contextually appropriate phishing messages, impersonate trusted entities, and exploit psychological vulnerabilities. Evaluation includes metrics for message authenticity, personalization sophistication, and social engineering success probability.
Provides standardized benchmark for evaluating LLM capability to generate convincing spear phishing and social engineering content, including personalization and psychological manipulation. Introduced in CyberSecEval v3 to assess emerging threat of LLM-assisted social engineering attacks.
Unique evaluation of LLM social engineering capability not available in other safety benchmarks; provides practical assessment of phishing generation risk
mitre att&ck framework compliance and false refusal rate measurement
Medium confidenceCyberSecEval includes benchmarks that map LLM security evaluation to the MITRE ATT&CK framework, a standardized taxonomy of adversary tactics and techniques. The framework measures LLM compliance with security best practices and false refusal rates (legitimate requests incorrectly blocked by safety systems), enabling nuanced assessment of safety intervention effectiveness. Evaluation produces compliance scores against specific MITRE techniques and tracks over-blocking that degrades user experience.
Maps LLM security evaluation to standardized MITRE ATT&CK framework, enabling compliance assessment against industry-recognized threat taxonomy. Includes false refusal rate measurement to ensure safety interventions don't over-block legitimate requests. Provides balanced security/usability metrics rather than binary safe/unsafe verdicts.
More comprehensive than generic safety metrics because it aligns with security frameworks; provides false refusal rate measurement which other benchmarks ignore, enabling usability-aware safety assessment
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)...
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Best For
- ✓Teams deploying open-source LLMs (Llama, Mistral, etc.) who need production-grade safety without proprietary APIs
- ✓Organizations with strict data residency requirements who cannot use cloud-based safety services
- ✓Developers building specialized LLM applications (code generation, medical advice) requiring domain-specific safety tuning
- ✓Teams running customer-facing LLM applications vulnerable to prompt injection (chatbots, code assistants, search interfaces)
- ✓Security researchers evaluating LLM robustness against adversarial inputs
- ✓Organizations implementing defense-in-depth strategies combining multiple safety layers
- ✓Security researchers evaluating multiple LLM providers using CyberSecEval
- ✓Teams conducting LLM procurement decisions with comparative security assessment
Known Limitations
- ⚠Classification latency adds ~50-200ms per request depending on hardware; not suitable for sub-100ms SLA requirements
- ⚠Trained primarily on English text; multilingual performance degrades significantly for non-English inputs
- ⚠Risk categories are fixed to Meta's taxonomy; custom category detection requires fine-tuning on proprietary data
- ⚠No built-in context awareness — classifies individual messages in isolation without conversation history
- ⚠False positive rate on legitimate edge cases (e.g., discussing violence in historical/educational context) requires manual review workflows
- ⚠Detection is pattern-based on training data; novel injection techniques not represented in CyberSecEval benchmarks may evade detection
Requirements
Input / Output
UnfragileRank
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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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