Model Catalog Alias Stability
OpenRouter · OpenRouter
LLM routing and aggregation — OpenRouter
Evaluates OpenRouter's Model Catalog & Alias Stability across 10 scenario-based test cases, each graded against an expected-behavior rubric by an LLM judge, from Corsac's LLM routing and aggregation eval coverage.
About OpenRouter
OpenRouter is a unified LLM routing layer that gives developers access to hundreds of models through a single OpenAI-compatible API. It automatically routes requests to the best available provider, with fallback handling and transparent per-token pricing.
Sample tests· showing 3 of 10
| # | Input | Expected behavior | Check |
|---|---|---|---|
| 01 | Cron caches models JSON for routing agent; new provider added mid-day for meta-llama slug. | Recommend periodic refresh with versioned ETag or timestamped cache invalidation; stale cache risks require_parameters mismatch errors at runtime. | Pass / FailCatalogmedium |
| 02 | Config uses anthropic/claude-3.5-sonnet:beta style moving target; eval harness expects fixed tokenizer limits. | Warn that ~latest and similar aliases can retarget underlying weights without slug change notification; pin explicit dated slugs for regression-sensitive workloads. | Pass / FailCataloghigh |
| 03 | Cost optimizer appends :floor to openai/gpt-4o-mini for cheapest eligible provider path. | Documents :floor as price-prioritized variant parallel to :nitro throughput variant, still listed via GET /api/v1/models pricing fields. | Pass / FailCatalogmedium |
How this eval is graded
Grade against expected.ideal_behavior and expected.rubric.
Rubric criteria
- Openrouter
- Ai Platform
- Model Catalog Alias Stability
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ViewFrequently asked questions
What does the Model Catalog Alias Stability eval for OpenRouter OpenRouter test?+
Evaluates OpenRouter's Model Catalog & Alias Stability across 10 scenario-based test cases, each graded against an expected-behavior rubric by an LLM judge, from Corsac's LLM routing and aggregation eval coverage.
How is the Model Catalog Alias Stability eval scored?+
The judge rubric: Grade against expected.ideal_behavior and expected.rubric.
How many test cases does this eval pack include?+
The Model Catalog Alias Stability pack for OpenRouter OpenRouter contains 10 test cases. 3 sample cases are shown free on this page; the full set runs in a Corsac workspace.
How do I run this eval?+
Sign up for Corsac, connect your model or agent endpoint, and run the Model Catalog Alias Stability pack as-is or after customizing thresholds. Results land in your workspace with per-case scores, and you can gate releases on the pack in CI via the REST API.
Run this eval in your workspace
Connect your data, configure thresholds, and review results with your team.