# LayerLens Stratix Documentation

LayerLens Stratix is the AI evaluation platform for teams that need to know — before customers do — whether a model, prompt, or agent is good enough to ship. Browse the world's largest public catalog of model evaluations, run private evaluations on your own data, score traces with deterministic rules and LLM judges, and ship AI you can trust.

{% hint style="info" %}
**Recent updates**

* **System judges shipped** — a curated set of platform-maintained LLM judges for quality, safety, and policy, ready to run with no setup.
* **SDK v1.3.0** — `client.judge_optimizations` (GEPA) and trace-set filtering on `client.trace_evaluations.create`.

[See the full release notes →](https://github.com/LayerLens/gitbook-full/blob/main/13-reference/release-notes/latest.md)
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## Three customer-facing experiences

{% tabs %}
{% tab title="Stratix Public" %}
**`stratix.layerlens.ai`** — anonymous browsing of 175+ models, 52+ benchmarks, and 2,000+ public evaluations. Compare any two models head-to-head. No sign-up required.

[Start with Stratix Public →](/2.-get-started/public.md)
{% endtab %}

{% tab title="Stratix Premium" %}
**`app.layerlens.ai`** — the logged-in workspace where teams run private evaluations, build judges, score traces, manage scorers, run agentic evaluations, and govern AI quality across an organization.

[Start with Stratix Premium →](/2.-get-started/premium.md)
{% endtab %}

{% tab title="Stratix SDK" %}
**`pip install layerlens --extra-index-url https://sdk.layerlens.ai/package`** — the Python client SDK (v1.3.0) for programmatic evaluation, judge orchestration, and trace ingestion. 138 sample programs.

[Start with the SDK →](/2.-get-started/sdk.md)
{% endtab %}
{% endtabs %}

## Pick a path

<table data-view="cards"><thead><tr><th></th><th></th><th></th></tr></thead><tbody><tr><td><strong>I'm a builder</strong></td><td>Ship faster with evaluations wired into your dev loop.</td><td><a href="https://github.com/LayerLens/gitbook-full/blob/main/01-overview/personas-paths.md#builder">Builder path</a></td></tr><tr><td><strong>I'm an operator</strong></td><td>Run live AI in production with quality gates and continuous evaluation.</td><td><a href="https://github.com/LayerLens/gitbook-full/blob/main/01-overview/personas-paths.md#operator">Operator path</a></td></tr><tr><td><strong>I'm a researcher</strong></td><td>Explore 175+ models against 52+ benchmarks, browse 2,000+ public evaluations.</td><td><a href="https://github.com/LayerLens/gitbook-full/blob/main/01-overview/personas-paths.md#researcher">Researcher path</a></td></tr><tr><td><strong>I'm an admin or buyer</strong></td><td>Set up your org, manage seats and credits, evaluate enterprise readiness.</td><td><a href="https://github.com/LayerLens/gitbook-full/blob/main/01-overview/personas-paths.md#admin-buyer">Admin/Buyer path</a></td></tr></tbody></table>

## The Stratix Workflow

Five stages from raw model to governed production. Every Premium capability maps to one of them.

{% hint style="info" %}
**Select → Build → Observe → Evaluate → Improve.** This is the spine. Every concept, how-to, tutorial, and recipe in this documentation pins to one of these stages. [Learn the workflow →](/1.-introduction/the-stratix-workflow.md)
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## What's new

* **Q1 2026 model leaderboard** — refreshed quarterly with GPT-5.3, Claude Opus 4.6, Gemini 3.1 Pro/Flash, and 200+ more.
* **Agentic evaluations** — pre-deployment quality gates for multi-step agents. [Read the announcement](/4.1-general-use-cases/agentic-evals-overview.md).
* **GEPA judge optimization** — automatically tune your LLM judges against ground-truth labels. [Read the concept](/8.-evaluate-score-the-outputs/judges-1.md#judge-optimization-gepa).

## Need help?

* **In-app:** click the Assistant icon (Premium only) for context-aware help.
* **Email:** <support@layerlens.ai>
* **Docs feedback:** open an issue or reach out via the in-app feedback form.

## Where to next

* New here? → [What is LayerLens Stratix?](/1.-introduction/what-is-layerlens-stratix.md)
* Want to ship today? → [Getting Started](/2.-get-started/02-get-started.md)
* Researching for purchase? → [How Stratix compares](/1.-introduction/how-stratix-compares-deep.md)
* Building a business case? → [Pricing](/readme.md)


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