AI article
The New System Design Question in 2026 Interviews: Design an LLM Chat Service
Community description: A ChatGPT-style chat service is showing up in system design loops. Walk through streaming, token rate limits, context, and GPU scheduling.
Dev.to | Oct 5, 2026 | Branden Floris
Automated excerpt
Users send a message and see the reply stream in token by token. Output tokens: 100M x 500 = 50 billion per day. GPUs: Suppose one model replica, with batching, produces 2,500 output tokens per second.
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