> ## Documentation Index
> Fetch the complete documentation index at: https://docs.physionlabs.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Run batch evaluations

> Evaluate multiple clips while respecting account limits.

Submit each clip as a separate evaluation. Keep the returned IDs and retrieve each result independently.

## Recommended approach

* Cap concurrent submissions at your account limit.
* Honor `Retry-After` when the API returns `429`.
* Let the SDK retry safe requests with exponential backoff.
* Use a stable metadata ID to connect each evaluation to your own record.

Both SDKs allow four concurrent requests by default. Configure `maxConcurrency` in TypeScript or `max_concurrency` in Python when your account has a different limit.

<Warning>
  A create request can succeed before its connection fails. The SDK sends `evaluations.create` only once because submitting it again can create and charge for a second evaluation. Save every returned evaluation ID.
</Warning>