x.com/sethbannon/status/2007161907392958806
1 correction found
$15 total all-in (≈ $0.42/student)
The underlying write-up says the $15 figure was only the variable usage cost and explicitly notes an additional ElevenLabs subscription fee, so it was not the full all-in cost.
Full reasoning
The post overstates the economics by calling the exam "$15 total all-in". In the professor's write-up, the same metric is reported as "0.42 USD per student (15 USD total), but also the $99/month ElevenLabs subscription". Later, the article again says "Total cost for 36 students: 15 USD" and breaks that down into Claude, Gemini, OpenAI, and ElevenLabs voice-minute usage — i.e. the $15 is the metered run cost, not the full cost including the platform subscription.
So the accurate takeaway is: about $15 in usage for those 36 exams, plus the separate ElevenLabs subscription cost. That means describing it as "all-in" is incorrect.
2 sources
- Fighting Fire with Fire: Scalable Personalized Oral Exams with an ElevenLabs Voice AI Agent | A Computer Scientist in a Business School
By the Numbers ... 0.42 USD per student (15 USD total), but also the $99/month ElevenLabs subscription ... Total cost for 36 students: 15 USD.
- How much does ElevenLabs Agents (formerly Conversational AI) cost? – ElevenLabs
Voice only calls are charged based on the call duration ... Tier | Price | Minutes included ... Pro | $99 | 1,100 ... LLM costs are passed through separately.