Succinct

Find the smallest model that works

Run evals across multiple LLMs, apply your own judge, and get statistically backed answers on the most efficient model for your task.

Confidence you can trust

Statistically grounded — Wilson intervals & binomial tests, not vibes. Early stopping — stop wasting tokens once a model clearly passes or fails. Judge your way — combine programmatic checks with an LLM judge.

Built for clarity

Every run shows exactly: Which models passed, failed, or stopped early. Confidence intervals vs your target threshold. Cost and latency per successful answer.

Streamline your workflow

Upload datasets & rubrics in JSONL/JSON. Configure runs with p*, α, batch size, and model ladder. Drill into details: per-model metrics, per-item evidence, judge rationales.

Multiple models... just the right one

Compare responses across different models to find the perfect balance of quality, cost, and performance for your specific needs.

Configuration

Run parameters (read-only)

Evaluation Parameters

Target Success Rate

85%

Confidence Level

95%

Sample Size

150

Batch Size

25

Early Stopping

Enabled

Model Ladder

#1 Llama 2 7BT: 0 Max: 512
#2 Claude HaikuT: 0 Max: 512
#3 GPT-5T: 0 Max: 512

llama-2-7b

Cost: X0.002Tokens: 1,247Accuracy: 72%
Click "Run eval" to see llama-2-7b's response...

claude-haiku

Cost: X0.008Tokens: 1,892Accuracy: 85%
Click "Run eval" to see claude-haiku's response...

gpt-5

Cost: X0.015Tokens: 2,156Accuracy: 100%
Click "Run eval" to see gpt-5's response...

Number of Models: 3

Plans & Pricing
Stop overspending on LLMs
Find the smallest model that clears your bar.
Run quick sanity checks or comprehensive evaluations.
Starter
Run quick sanity checks with open models.
$0
per year, per user.
Start a Run
Open source models
Basic statistical tests
Community support
Standard eval templates
Basic run analytics
Professional
Unlimited runs, advanced judge configs, cost analysis, CSV/JSON exports.
$16
per year, per user.
Subscribe
Unlimited runs
Advanced judge configs
Cost analysis & optimization
CSV/JSON exports
Priority support
Custom model integrations
Advanced statistical tests
Detailed run explorer
Enterprise
Custom integrations, SLAs, private model hosting.
$160
per year, per user.
Contact sales
Everything in Professional
Custom integrations
Service level agreements
Private model hosting
Dedicated support team
Custom onboarding
Advanced security
White-label options
Frequently Asked Questions
Get answers about model evaluation,statistical confidence, and cost optimization.
A run is a set of evaluation items judged across multiple language models until one passes your criteria. Each run helps you find the smallest model that meets your performance requirements.
We use your custom rubric combined with an LLM judge to evaluate each model's performance, backed by statistical confidence intervals and binomial tests for reliable results.
Yes! You can connect your own models via OpenRouter or self-hosted endpoints. We support most popular model providers and custom integrations.
Almost always. You'll discover if a 3B or 7B model can handle your task instead of defaulting to expensive large models like GPT-4, often reducing costs by 60-90%.
We use Wilson confidence intervals and binomial hypothesis tests to provide statistically grounded results. Early stopping prevents wasting tokens once confidence thresholds are met.
Upload your dataset in JSONL/JSON format, define your evaluation rubric, configure your run parameters, and we'll test models from smallest to largest until one passes.
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