What are my concurrency limits?

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 throttle limit). For free accounts, the default is 5 for Asynchronous and Streaming transcriptions. For upgraded accounts, the default is 200 for Asynchronous transcriptions and 100 for Streaming transcriptions.

You can check your concurrency limits on your dashboard.

Asynchronous speech-to-text limits

Below are the default limits for how many requests you can have processing in parallel when submitting jobs to our /v2/transcript endpoint.

Streaming speech-to-text limits

Below are the default limits for how many Streaming sessions you can have open in parallel.

Note: Our Streaming STT feature includes automatically scaling concurrency. Anytime you are using 70% or more of your streaming concurrency, your concurrency limit will automatically increase by 10% every sixty seconds.

You can find more information on Concurrency Limits in our Documentation here!

Need a higher concurrency?

We offer custom concurrency limits that scale to support any workload at no additional cost. If you need a higher concurrency limit please either contact our Sales team or reach out to us at support@assemblyai.com.

Rate Limits

In addition to the concurrency limit, there’s a rate limit for the API, which restricts users to a maximum of 20,000 requests per five minutes.