LLM Evaluation Services

LLM evaluation services to know how your model really performs.

LLM evaluation services combining human and rubric-based scoring of model quality, safety and factuality — with domain experts grading the outputs automated metrics miss, across 25+ languages.

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98%accuracy after QASchema checksConsistencyGold-set auditHuman review
700+
Expert evaluators
25+
Languages
4-stage
QA workflow
98%
Reviewer agreement
Why human evaluation

Model evaluation that catches what benchmarks miss

Leaderboard scores rarely tell you if a model is safe to ship. Our LLM evaluation services put trained human raters and STEM/domain SMEs on your outputs, scoring reasoning, factuality, safety and helpfulness against a rubric you define. Pair evaluation with our LLM fine-tuning and data validation to close the loop from measurement to improvement.

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98%accuracy after QASchema checksConsistencyGold-set auditHuman review
What we evaluate

Our LLM evaluation framework: rigorous, human-led assessment

Built as a repeatable LLM evaluation framework, we score model outputs against your rubric across quality, safety, reasoning and factuality — and surface the failure modes that decide whether a model is ready to ship.

Quality & Helpfulness

  • Rubric-based response grading
  • Task-completion scoring
  • Coherence & instruction-following
  • Head-to-head model comparison

Safety & Robustness

  • Toxicity & bias evaluation
  • Adversarial & jailbreak testing
  • Policy-compliance review
  • Edge-case discovery

Factuality & Reasoning

  • Hallucination detection
  • Step-by-step reasoning grading
  • STEM & code correctness
  • Citation & source checking

Multilingual Evaluation

  • Quality across 25+ languages
  • Cultural & localization checks
  • Native-speaker review
  • Locale-specific rubrics

Benchmarking

  • Custom benchmark design
  • Model-vs-model scoring
  • Regression tracking
  • Reproducible protocols

Validation & QA

  • Gold-set calibration
  • Inter-rater agreement
  • Bias & drift monitoring
  • Audit-ready reporting
See data validation
Why Graveiens

Why teams choose our LLM evaluation services

Compliance-first delivery and a pay-on-approval model that de-risks every engagement.

Expert graders

STEM and domain SMEs who can judge correctness, not just fluency.

Calibrated raters

Inter-rater agreement tracking keeps scoring consistent and defensible.

Beyond English

Native-speaker evaluation across 25+ languages.

Pay on approval

Invoiced only for approved deliverables.

FAQ

Questions, answered

What do your LLM evaluation services cover?
Quality and helpfulness, safety and robustness, factuality and reasoning, multilingual quality and custom benchmarking — human-graded against your rubric with calibration and audit-ready reporting.
How is your evaluation different from automated metrics?
Automated metrics miss reasoning errors, subtle safety issues and factual mistakes. Our human evaluators — including domain SMEs — grade against your rubric to catch what benchmarks cannot.
Can you design a custom benchmark?
Yes. We build custom rubrics and benchmark sets to your requirements, with reproducible protocols and regression tracking across model versions.
Do you evaluate in languages other than English?
Yes — native-speaker evaluation across 25+ languages with locale-specific rubrics.
How do we start?
A small paid evaluation batch against your rubric, so you can see reviewer quality before scaling.

Related services

LLM fine-tuning Data validation Specialized workforce Content moderation

Evaluate your model with experts

Send us a sample task. You only pay for deliverables you approve.

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