Performance Testing

LLM Performance Testing

Standard functional testing validates that your model produces the correct output — but it does not tell you whether it will still produce the correct output when 500 concurrent users hit it simultaneously, or whether response latency will breach your SLA.

Deliverables
Latency distribution report (P50/P95/P99) at production load profiles
Quality degradation curve — measuring accuracy against concurrency
Token efficiency and cost analysis across load scenarios
k6 Locust DeepEval Helicone
Resilience & Red Team

LLM Resilience & Red Team Testing

Your model may perform flawlessly in normal operation — but what happens when an adversarial user deliberately tries to manipulate it? Prompt injection, jailbreaks, data exfiltration attempts, and social engineering attacks are active threats for any publicly.

Deliverables
Full OWASP LLM Top 10 coverage report with findings by severity
Prompt injection and jailbreak attempt log with reproduction steps
Hallucination audit across domain-specific factual scenarios
Promptfoo Garak DeepEval LangSmith
Recovery & Continuity

Recovery & Continuity Testing

When your primary LLM provider goes down — and all major providers have experienced outages — does your system gracefully degrade, activate a fallback, and recover with no context loss? Or does it stall completely, leaving users with a non-responsive.

Deliverables
Chaos engineering report — fallback activation, context preservation, RTO
Fallback architecture assessment with remediation recommendations
Compliant incident logging configuration review
Chaos Toolkit Locust Helicone Arize Phoenix
RAG Pipeline Testing

RAG Pipeline Testing

Retrieval-augmented generation pipelines introduce a layer of risk that model testing alone cannot address. Poor retrieval quality, source attribution errors, context window mismanagement, and knowledge cutoff issues can all cause your RAG system to produce.

Deliverables
RAGAS evaluation report — faithfulness, context precision, answer relevancy
Retrieval quality analysis — hit rate, MRR, false retrieval patterns
Source attribution audit — hallucinated vs. retrieved vs. fabricated
RAGAS DeepEval LangSmith Arize Phoenix
Evaluation Framework Design

Evaluation Framework Design

A one-time test engagement is not enough for a production LLM system. You need the ability to continuously monitor quality as your model, prompts, and data evolve. We design and build evaluation frameworks that your team can run and own independently —.

Deliverables
LLM-as-judge evaluation suite — prompt templates, scoring rubrics, calibration data
CI/CD regression integration — GitHub Actions or your preferred pipeline
MLflow experiment tracking configuration with audit trail
MLflow DeepEval Weights & Biases OpenAI Evals
AI Governance & Regulatory

AI Governance & Regulatory Readiness

Most organisations approach governance as an afterthought — assembling evidence after the system is built, rather than building evidence generation into the testing process from the start. Retrofitting an audit trail for UK regulatory institutions is costly.

Deliverables
Bias audit report aligned to Equality Act 2010 and UK fairness standards
Risk classification assessment aligned to UK regulatory institution expectations
Model validation evidence pack for internal audit and regulatory review
MLflow Weights & Biases LangSmith Custom UK DPIA Templates
FAQ

Common Questions

Most engagements run two to six weeks, depending on scope. A focused performance or resilience test for a single deployment is typically two to three weeks. A comprehensive multi-service engagement covering performance, resilience, RAG testing, and governance.
We prefer to test in a staging environment that mirrors production closely — with production traffic data replayed, not live user traffic. We can work entirely within your infrastructure (including air-gapped or private-cloud environments) or through secure.
We are model-agnostic. We have tested GPT-4o and GPT-4 Turbo via Azure OpenAI (UK South), Claude 3.5 Sonnet and Claude 3 Opus via AWS Bedrock (eu-west-2), Gemini 1.5 Pro via Vertex AI (europe-west2), and open-weight models including Llama 3, Mistral 7B, and.
We sign an NDA before any technical discussion. All testing is conducted under UK GDPR and Data Protection Act 2018. We work within your chosen infrastructure — we do not require access to client or patient data for testing; we use synthetic data generation.

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You Need?

Tell us about your LLM deployment and we'll identify your highest-risk areas within two working days — at no cost, under NDA.