fixed faq

Author: Noah Raynor

fern/observability/simulations-quickstart.mdx

@@ -732,8 +732,8 @@ curl -X GET "https://api.vapi.ai/eval/simulation/run?status=ended" \
 ## Frequently asked questions
 
 <AccordionGroup>
-  <Accordion title="Is running simulations free?" icon="dollar-sign">
-    No, simulations cost the same as regular calls. Both the tester and target assistants are charged normally for LLM, TTS, and STT usage. Chat mode (`vapi.webchat`) is typically cheaper since it doesn't use voice processing.
+  <Accordion title="How many concurrent simulations can I run?" icon="gauge">
+    Simulation concurrency follows your organization's call concurrency limits. Each **voice simulation** uses **2 concurrent call slots** (one for the AI tester, one for your assistant being tested). **Chat mode** simulations are more efficient since they don't require audio processing. If you need higher concurrency limits, contact support.
   </Accordion>
 
   <Accordion title="What's the difference between Simulations and Evals?" icon="scale-balanced">