Enterprise AI Quality Testing. Brier-Calibrated.
Run your AI against 8 models simultaneously. Get calibrated quality scores you can trust — not just pass/fail metrics that obscure the real failure modes.
No credit card required for trial
# Submit test cases. Get Brier-calibrated report in <5 minutes. curl -X POST https://eval.nexus.aequara.com/api/evaluate \ -H "Authorization: Bearer eval_your_key" \ -H "Content-Type: application/json" \ -d '{ "eval_id": "my-model-v2-release", "test_cases": [{ "id": "tc-001", "prompt": "Summarize this contract clause...", "expected_output": "Termination requires 30-day notice..." }] }' # Returns: overall_quality_score: 0.84, brier_score: 0.12 # model_agreement_matrix + failure_taxonomy included
What makes NEXUS EVALUATOR different
Arize AI starts at $500+/mo. LangSmith at $39/mo. Neither offers multi-LLM consensus scoring, Brier calibration, or independence scoring.
Multi-LLM Consensus
Up to 8 models score every test case independently. Independence scores (Geman-Hwang) reveal when models genuinely agree vs. are correlated.
Brier Calibration
Not just pass/fail. Every quality score carries a Brier calibration showing how well model confidence tracks reality across your test suite.
Failure Taxonomy
Every failure is auto-classified: hallucination, refusal, format error, partial answer, or wrong reasoning. Fix the right thing first.
What Arize and LangSmith don't have
Feature-by-feature comparison with the two leading evaluation platforms.
| Feature | NEXUS EVALUATOR | Arize AI | LangSmith |
|---|---|---|---|
| Brier-calibrated scores | ✓ | ✗ | ✗ |
| Multi-LLM consensus (8 models) | ✓ | ✗ | ✗ |
| Independence scoring (Jaccard) | ✓ | ✗ | ✗ |
| Failure taxonomy (5 modes) | ✓ | ✓ | ✓ |
| Regression diff vs previous run | ✓ | ✓ | ✓ |
| Confidence calibration curve | ✓ | ✗ | ✗ |
| Adversarial edge case discovery | ✓ | ✗ | ✗ |
| Starting price | $499/mo | $500+/mo | $39+/mo |
Simple, transparent pricing
All plans include Brier calibration, failure taxonomy, and full API access.
Startup
500 test cases/mo
3 models
- ✓3-model consensus (Groq QWen, DeepSeek, Claude)
- ✓Brier-calibrated quality score
- ✓Failure taxonomy (5 categories)
- ✓Model agreement matrix
- ✓JSON + REST API
Growth
2,000 test cases/mo
5 models
- ✓Everything in Startup
- ✓5-model consensus + DeepSeek-R1 reasoning
- ✓Confidence calibration curve
- ✓Regression diff vs previous run
- ✓Priority support
Enterprise
Unlimited test cases
8 models
- ✓Everything in Growth
- ✓8-model full consensus
- ✓Real-time dashboard
- ✓Adversarial edge case discovery
- ✓SLA + dedicated Slack channel
- ✓Custom model integration
Free trial: 50 test cases on Startup plan — no credit card required. Email us to activate.