The open-source LLM experiment runner
for product teams.
Define test sets, version prompts, and compare GPT-4o, Claude, Gemini side-by-side — with cost, latency, and quality scores. Free to self-host. Built for teams who ship.
Cloud hosted · Free to self-host · No credit card required
Everything you need to choose
the right model, every time
Multi-Model Benchmarks
Run the same prompt across GPT-4o, Claude, Gemini, Llama, and any model — side by side, on the same test data.
Latency Tracking
Measure p50, p95, and p99 response times per model. Know exactly how fast each model responds in production conditions.
Cost Analysis
Track token usage and cost per request, per model. See exactly what each experiment costs you — before you ship.
Accuracy Scoring
Define custom eval criteria. Score outputs with automated checks, regex assertions, or human-in-the-loop review workflows.
Prompt Versioning
Every prompt change becomes a tracked version. Compare v1 vs v2 head-to-head with the same dataset to measure real improvement.
Test Dataset Management
Upload and reuse evaluation datasets across experiments. Consistent test data means results you can actually trust.
One-Click Re-Evaluation
New model just dropped? Re-run all your existing experiments against it instantly — no reconfiguration, no setup.
Feature-Level Tracking
Organize experiments by product feature. See which model powers each part of your app and when it was last evaluated.
Visual Dashboards
Rich comparison charts for cost vs accuracy vs latency. Make model decisions backed by data — not hunches.
Stop guessing.
Start measuring.
Start free.
Scale when you're ready.
Run parixai on your own infrastructure. Full feature access, your data stays on your servers, Apache 2.0 License.
- Unlimited experiments
- All model providers
- Prompt versioning
- Cost & latency tracking
- Custom eval criteria
- Team collaboration
- CLI + REST API
Fully managed. No infra to run, automatic model updates, team dashboards, and priority support.
- Everything in Self-Hosted
- Managed hosting — zero ops
- Automatic model registry updates
- Shareable experiment reports
- SSO & role-based access
- Priority support
- SLA guarantee
Common questions
Your next model decision deserves a paper trail
parixai is open source and free to self-host. Or join the waitlist for a managed cloud version.
Open source · MIT licensed · No vendor lock-in