Stop guessing. Start measuring with real data.
Test GPT-5.2, Claude Opus 4.5, Gemini 3 and 15+ LLMs with your prompts.
See quality, speed, and cost metrics instantly. Free, no signup required.
Select your models and hit run. We'll run a real evaluation against the golden set.
If you've ever had these thoughts, you're in the right place.
"Maybe I can use GPT-5.2 Nano for this task and save 80% on API costs?"
"Users are complaining about slow responses. Which model will give me sub-second latency?"
"My agent keeps hallucinating on edge cases. How do I find a more reliable model?"
"I'm building a code assistant. Does Claude or Gemini handle tool calls better?"
"We're launching next week. How do I prove to my team which model to use?"
"Every model claims to be the best. How do I cut through the marketing?"
Stop guessing. Start measuring.
Everything you need to ship
AI Agents to production
Stop testing on "vibes". Generate or upload a golden dataset of 50+ edge cases and run your prompt against them automatically.
One click to run your prompt against Gemini 3 Flash, GPT-5.2, and Claude Opus 4.5. See exactly which model handles your specific tools correctly.
Visualize the Pareto frontier. Often a cheaper, faster model (Gemini Flash) performs just as well as the expensive ones for specific tasks.
One wrong answer costs $5,000/day at scale
$40.00
Model returns wrong answer
Guessing • No verification • Silent failures
$40.50
Catches error before shipping
Verified • Tested • Production-ready
At 10,000 transactions/day
Save $5,000 daily
A golden dataset is a curated collection of high-quality test cases that represent real-world scenarios your AI agent will encounter. Think of it as the "source of truth" for evaluating your model's performance.
Each test case includes the expected correct response, allowing automated evaluation of accuracy.
Includes challenging scenarios, ambiguous inputs, and corner cases that reveal model limitations.
Run the same tests across different models for apples-to-apples comparison of performance.
"Without a golden dataset, you're just guessing if your AI works. With one, you have measurable proof."
— Yuval Zaragai, ONE ZERO
No credit card required • 50 free evaluations/month
Compare the two leading frontier models
Google vs OpenAI head-to-head
Coding prowess vs context window