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how unlimited works

this plan gives you unlimited text-to-speech generation and unlimited silk agents. you choose a concurrency capacity (the number of requests silk can process simultaneously) and your plan includes that capacity every month. there is no published minute allowance and no normal-use slowdown after a hidden threshold. silk records generated audio duration for operations and usage visibility, never to calculate an unlimited customer’s bill. for unlimited customers, the usage dashboard shows:
  • purchased lines: your selected concurrency capacity
  • active lines: agent sessions currently starting or running
  • failed requests: recent rejected or failed requests, with their http error codes
capacity belongs to the account and is shared by mulberry, muga, agents, api keys, projects, and voices. a request or agent session releases its slot when it completes, fails, times out, or is cancelled.

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pricing

upgrades take effect immediately with the provider’s prorated adjustment. downgrades and cancellation take effect at renewal; neither changes your api keys or account configuration. each renewal is charged on the provider cycle date, not on a fixed 30-day approximation.