// About us
We turned our own integration pain into a product
Test AI Models started inside Eterna Creative — a product studio helping clients ship LLM features. Now we're building in public for agent teams, agencies, and LLM product companies.
120+
engineers
36
models available
490+
API calls in dataset
Best AI Use
Contra/Bubble award
// Our story
Built from real client work, not a pitch deck
We run Eterna Creative, a product studio. Clients kept asking us to integrate LLMs into their products - and every project started with the same question: which model is actually best for our use case?
To answer it, we had to integrate 3-4 providers, set up every API, buy credits for each, wire connections from the application, and extract outputs, costs, and speed back. That took 2-3 days per project - and we'd usually pick one model and delete all the other integrations. Wasted time, and that was only for a handful of models.
So we built Test AI Models for ourselves. We entered a Contra x Bubble competition, won Best Use of AI, and that gave us confidence we were onto something real.
We first aimed at everyone, then pivoted toward high-API-usage teams: agentic product teams and software companies integrating LLMs into client products. Now we're refining the product, building in public, and growing.
// Our mission
API bills shouldn't be a black box. We built Test AI Models so any team can paste a real prompt, see cost-per-inference across leading models, and decide on quality, speed, and cost with side-by-side data in 30 seconds.
// Values
Three principles we won't compromise
Decisions from real runs
Synthetic benchmarks miss your workload. We test on your prompts with real API calls so cost projections match production.
No provider bias
We integrate 36 models from every major provider. The winner is whichever model does your job at the lowest cost.
30 seconds to insight
No API keys to wire up for testing. Start with a daily free test and re-optimize whenever the model landscape shifts.
// Who we serve
Teams with real API volume
We focus on builders where model choice is a COGS decision. Inference is your COGS - most teams overpay on 60-80% of it because nobody tested the cheaper model on their actual prompts.
Software agencies
Ship AI features for clients and prove model choices with side-by-side cost data - not guesswork.
AI agent teams
Test multi-step agent workflows and find which hop can move to a cheaper model without breaking quality.
LLM product teams
Optimize high-volume production steps with real prompts, real latency, and real cost at scale.
// Your data
Your prompts stay private
We're a pass-through testing platform - not a data broker or model trainer.
- Real API calls on your prompts - never cached or pre-computed for comparisons
- We never train on or share your prompts
- We use anonymised task type and results to improve community model rankings - toggle off anytime
- Your exact prompts are never shown publicly - only aggregate signal
- Delete individual tests or your full account at any time
// Vs alternatives
What you can't get anywhere else
One prevented integration mistake pays for itself many times over. Tracking tells you you're overpaying. We tell you exactly what to switch to - tested on your real prompt, quality verified, so the switch won't break anything.
// Security
Built for production workloads
Practical protections for teams testing real prompts and billing data.
- HTTPS encryption for all data in transit
- Passwords stored with bcrypt hashing
- Provider API keys stored server-side only - never exposed in the frontend
- GDPR rights: access, deletion, and portability on request
// Team
Built by Eterna Creative
Test AI Models is built by Eterna Creative - a product studio focused on practical AI tooling for teams shipping LLM features and agent workflows.
> founder_Marko Milojkovic
Founder
Runs Eterna Creative and built Test AI Models after repeated multi-provider LLM integration work for client products.
> lead engineer_Artur Nersisyan
Lead engineer
Builds and maintains the platform, provider integrations, and core testing workflows.
> growth partners_Lead Agents
Growth partners
Marketing and growth partners helping us reach teams optimizing LLM API spend.
// Company
Legal entity details
- Operated by Marko Milojkovic PR digital m2
- Registration number: 67812549
- VAT number: 114733003
- Serbia
- Payments processed by Paddle (Merchant of Record)
- Contact: info@testaimodels.com
// What teams say
Real results from real prompts
“Client demos used to mean copying prompts into five playgrounds. Now we run the chain once, show the bill at 1M runs, and the margin conversation is easy.”
Founder
Software agency
“We swapped one default model on a high-volume step and cut that line item by 72% - the test took 30 seconds, not a week of spreadsheets.”
Engineering lead
B2B SaaS, 40k MAU
// Roadmap
What we're building next
Building in public - shipping features teams ask for most.
Smart alerts
Next upGet notified when a cheaper model matches your quality bar on recurring prompts.
System prompts
PlannedTest and compare system prompt variants across models on the same workload.
LLM-as-judge
PlannedAutomated quality scoring between model outputs so you can pick winners faster.
Quality tests
PlannedRegression-style quality checks to catch drift when switching models in production.