Unexpected Cost on Test Call – Call ID 7f30a6e8-26...
# support
Hey Vapi Team, we ran into a possible bug with LLM cost calculation on a short test call. Call Details: Call ID: 7f30a6e8-26b3-457f-ad04-80915c0d9fd5 Assistant ID: f7cbe813-eda4-4b24-9e96-8ad2051fcad4 (Strom & Gas) Timestamp: 2025-08-28 23:52 UTC Expected outcome: GPT-4o Cluster cost ~$0.05/min → <$0.05 for 54s Actual outcome: LLM cost was $5.99 for 54s (total $6.07) Token usage: 1,832,937 prompt tokens / 82 completion tokens This number of prompt tokens seems highly implausible for such a short call and likely indicates a calculation or logging error. I’ve attached screenshots for: – Cost breakdown – LLM breakdown – Call log Can someone look into this? Our account is now out of credit because of this single test. Thanks!
c
Hey, thanks for sharing your details. Our team will look into it and get back to you soon with an update.
any update?
c
\[ { "type": "transcriber", "cost": 0.01, "minutes": 0.9887166667, "transcriber": { "model": "nova-2", "provider": "deepgram" } }, { "type": "model", "cost": 5.9, "promptTokens": 1832937, "completionTokens": 82, "model": { "model": "gpt-4o", "provider": "openai" } }, { "type": "voice", "cost": 0.01, "characters": 370, "voice": { "model": "eleven_flash_v2_5", "voiceId": "BIvP0GN1cAtSRTxNHnWS", "provider": "11labs" } }, { "type": "vapi", "cost": 0.05, "minutes": 0.9037, "subType": "normal" }, { "type": "analysis", "cost": 0.000132, "analysisType": "summary", "promptTokens": 340, "completionTokens": 12, "model": { "model": "gemini-2.5-flash", "provider": "google" } }, { "type": "analysis", "cost": 0.0006256, "analysisType": "successEvaluation", "promptTokens": 2002, "completionTokens": 10, "model": { "model": "gemini-2.5-flash", "provider": "google" } }, { "type": "knowledge-base", "cost": 0, "promptTokens": 0, "completionTokens": 0, "model": { "model": "gemini-1.5-flash", "provider": "google" } } \]
Hey, could you check this breakdown and verify it yourself using the cost calculator? Let me know if you have any questions.