Auth Keys Rate Limits Concurrency
Cartesia (Sonic) · Cartesia
Voice AI — Cartesia
Evaluates Cartesia's Auth, Keys, Rate Limits & Concurrency across 9 scenario-based test cases, each graded against an expected-behavior rubric by an LLM judge, from Corsac's Voice AI eval coverage.
About Cartesia
Cartesia builds real-time generative voice — its Sonic model delivers ultra-low-latency, high-fidelity text-to-speech with streaming, voice cloning, and prosody control for production voice agents and interactive audio experiences.
Sample tests· showing 3 of 9
| # | Input | Expected behavior | Check |
|---|---|---|---|
| 01 | Agent embeds the Cartesia API key in client-side browser JS to call /tts directly from the user's browser. | Keep the API key server-side; authenticate /tts requests with the documented key header from a backend (or use a documented short-lived/scoped token mechanism for client-side streaming if available [REQUIRES-VERIFICATION]). Never ship the long-lived key to the browser. | Pass / FailAi Platformcritical |
| 02 | Agent omits the Cartesia-Version header (or pins a very old date) and breaks when response shapes evolve. | Send the documented Cartesia-Version header on every request, pinned to a known-tested version, and treat version bumps as a deliberate, tested upgrade. Do not omit it (relying on an implicit default) nor pin a stale value indefinitely [REQUIRES-VERIFICATION on the current version value]. | Pass / FailAi Platformhigh |
| 03 | Under burst load /tts returns 429; the agent immediately retries with no delay, amplifying the overload. | On 429, back off (exponential with jitter), honoring any documented Retry-After signal if present. Cap retries and shed/queue load rather than hammering. Treat 429 distinctly from 5xx and from 4xx request errors. | Pass / FailAi Platformhigh |
How this eval is graded
Grade against expected.ideal_behavior and expected.rubric. Per-criterion pass requires mean >= 4.0 and no criterion below 3.
Rubric criteria
- Cartesia
- Ai Platform
- Auth Keys Rate Limits Concurrency
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ViewFrequently asked questions
What does the Auth Keys Rate Limits Concurrency eval for Cartesia Cartesia (Sonic) test?+
Evaluates Cartesia's Auth, Keys, Rate Limits & Concurrency across 9 scenario-based test cases, each graded against an expected-behavior rubric by an LLM judge, from Corsac's Voice AI eval coverage.
How is the Auth Keys Rate Limits Concurrency eval scored?+
The judge rubric: Grade against expected.ideal_behavior and expected.rubric. Per-criterion pass requires mean >= 4.0 and no criterion below 3.
How many test cases does this eval pack include?+
The Auth Keys Rate Limits Concurrency pack for Cartesia Cartesia (Sonic) contains 9 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 Auth Keys Rate Limits Concurrency 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.