Hi! I am trying to use Gladia transcriber in Vapi, but I get this error on every call. The transcriber was saved and I'm sure the API key is right as well. Assistant ID - f32dc1da-62fb-4a83-ac3a-247264590362 one example for the call(not really useful i think) - 019d26c8-ac05-7662-a327-781b628388ac

Actionable Next Step: Go to your Vapi dashboard and review the Call Logs for the failed calls (

Observe > Call Logs

). Look for detailed error messages or configuration issues related to the Gladia transcriber. This will help pinpoint whether the failure is due to provider connectivity, configuration, or another issue. Tip: If the logs show a provider error, try switching to a fallback transcriber to keep your calls running while you investigate further. [See troubleshooting guide](https://docs.vapi.ai/calls/troubleshoot-call-errors) Source: - [Troubleshoot call errors](https://docs.vapi.ai/calls/troubleshoot-call-errors)

@Vapi Support Bot it tries to start vapi too many times until it reaches the max of free tier - which is 1 session, I don t think that should be more here- { "id": "log-33", "level": 50, "time": 1774472886677, "timestamp": 1774472886677000000, "severityText": "ERROR", "severityNumber": 17, "body": "Gladia V2 initialization failed", "attributes": { "category": "transcriber", "callId": "019d26d3-7355-7000-b0ba-e663be15806c", "orgId": "d586ad9c-b83c-4ffc-96ba-b734e8009732", "provider": "gladia", "type": "user", "error": { "message": { "message": "Request failed with status code 429", "data": { "statusCode": 429, "timestamp": "2026-03-25T21:08:06.603Z", "path": "/v2/live", "message": "Maximum number of concurrent sessions reached. Your Free Trial plan allows only up to 1 sessions. Please visit https://app.gladia.io/ to upgrade your plan.", "request_id": "G-825a4081" } }, "code": "ERR_BAD_REQUEST", "status": 429, "statusText": "Too Many Requests" } } }

Based on the information you've shared, the error message indicates that the Gladia transcriber is hitting the maximum number of concurrent sessions allowed on your Free Trial plan, which is limited to just one session. When Vapi tries to start multiple sessions, it exceeds this limit and triggers a "429 Too Many Requests" error from Gladia. To resolve this, you'll need to ensure that only one session is active at a time when using the Gladia transcriber on the Free Trial plan. If you need to run more than one session simultaneously, upgrading your Gladia plan would be necessary. If you have any other questions or need clarification, feel free to ask!

Message marked as helpful by @TurtleRo! 🎉