What is the concurrency limit for the API?

Last updated: August 26, 2026

A concurrency limit is the number of requests that can be processed for an account at any given time.

Each account has an assigned concurrency limit (also referred to as a rate limit). The default is 24.

Except for flux-kontext-max where the requests to our API is limited to 6 active tasks.

Video generation with flux-3-video has its own limit, starting at 5 concurrent video tasks. Higher video concurrency is available on paid and enterprise plans.

If you exceed your limit, it will return a status code 429 and you will have to wait until one of your previous tasks has finished.

If you require higher volumes, please contact us at support@blackforestlabs.ai