Simple Evals
for VibeCoders
Connect your vibecode app & auto-suggest evals
Generate synthetic data to improve current prompts
Monitor and A/B test against real-time data
Greg Brockman
OpenAI President
evals are surprisingly often all you need
Garry Tan
Y Combinator CEO
Evals are emerging as the real moat for AI startups
Mike Krieger
Anthropic CPO
If there is one thing we can teach people, it's that writing evals is probably the most important thing.
Kevin Weil
OpenAI CPO
Writing evals is going to become a core skill for product managers. It is such a critical part of making a good product with AI.
Inspired from best-in-class evals
We go deep in understand how leading AI solutions are leveraging evals and customise it for vibecoders
Accurate Industry Codes for Every Customer
Ramp transformed their fragmented classification system into a unified, RAG-powered pipeline that delivers precise NAICS codes for every account:
- Consistent 6-digit NAICS taxonomy shared across Risk, RevOps & Product
- Two-prompt RAG workflow with candidate retrieval and ranking
- Always-on eval harness with Kafka streaming for historical comparisons
Evaluation Framework
Retriever (LLM #1)
Is the correct NAICS code in the shortlist?
Example:
Input: "Tech recruiting firm in San Francisco"
Top-3 Candidates:
1. 561311 - Employment Placement Agencies
2. 541612 - HR Consulting Services
3. 519130 - Internet Publishing
Ranker (LLM #2)
How close is the chosen code to ground truth?
Guardrail Check
Did the ranker pick from the retriever's list?
Want to learn how big tech is doing evals?
Get a fresh case study delivered each week. No spam, ever :)