# Voice AI Detective: Solve the Murder Mystery

Interrogate AI suspects with your voice and solve the murder mystery.

- **Source:** [Hacker News: Show HN](https://news.ycombinator.com)
- **Published:** 2026-08-10
- **Topic:** [Data & AI](https://brifing.si/c/data-ai)
- **Original article:** <https://www.whodunnitai.com/>
- **On Brifing:** https://brifing.si/s/e19c93e7-c18a-4720-93c7-77f3ad5b1ee3

## Project Inception

This project began 2-3 years ago when voice AI agents were still in their infancy. The prototype at the time was intriguing but not fully satisfying. With recent advancements in technology, the project has been revisited and significantly improved.

## Technology and Infrastructure

The project utilizes OpenAI's GPT-realtime-2.1 model over WebRTC to enable voice interrogations. Due to the high cost of this model, certain restrictions are in place, such as authenticated Clerk user IDs and a 30-minute time limit per session.

## Suspects and Judging Process

Each suspect has a tool that activates upon direct accusations, recording who was accused and the evidence presented. A separate GPT-5-mini judge evaluates the validity of the evidence. Paraphrasing is accepted, while vague suspicions and fishing attempts are not.

## Technical Details

The project is built using modern technologies like Next.js, MongoDB, and Clerk. These technologies handle critical functions such as user authentication, data storage, and real-time communication, playing a crucial role in the project's backend.

## User Experience

Users engage in voice interrogations to solve the murder mystery. Each suspect has a unique character and reacts differently during questioning, providing a realistic detective experience and making the game enjoyable.

## Cost and Limitations

Due to the expensive nature of OpenAI's models, the project has cost constraints, including a 30-minute time limit per user. This limit helps control costs and prevents financial strain on the creator.

## Future Plans

Plans for the project include adding more suspects and refining interrogation mechanics. User feedback will also guide further improvements to enhance the overall experience.

## Significance and Impact

This project serves as an important example of how voice AI technologies can be used in the entertainment industry. It offers an engaging experience for both tech enthusiasts and gamers, showcasing the future potential of AI.

## Sources covering this story

- https://www.whodunnitai.com/ — 

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_Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._