Anthropic System Design Interview Questions
These are the 11 Anthropic system design interview questions AceOffer has reconstructed from candidate reports, sorted by how often each was reported. Inference API System Design leads at 41×. Every question shows when it was last reported; the catalog refreshes monthly.
Part of the full catalog of Anthropic interview questions, covering every round.
Key facts
- •11 distinct system design questions indexed
- •112 candidate reports across those questions
- •Most reported: Inference API System Design — 41× (last seen September 2026)
- •Refreshed monthly · last updated October 2026
Which Anthropic rounds ask system design questions?
The Anthropic rounds below are where these questions come up. Counts are distinct questions, not times asked.
Most reported: Inference API System Design — 41×
Which Anthropic system design questions get asked most?
Sorted by candidate-report frequency. Click any question for the full breakdown.
| Question | Round | Reported | Last seen |
|---|---|---|---|
| Inference API System Design Design an HTTP API service that exposes an LLM (large language model) inference/sampling function to users. Core function given: A black-box model… | System Design | 41× | September 2026 |
| ML Model Distribution / Deployment System Design Design a distributed system to download and deploy a large ML model (hundreds of GBs, e.g., 500 GB) from an external model… | System Design | 16× | August 2026 |
| Prompt Playground System DesignFree Design a prompt engineering playground platform similar to Anthropic Console. This is a full-stack design covering product features, UI/UX, backend architecture, data… | System Design | 15× | August 2026 |
| Batch Inference System Design Design a batch inference system for an LLM serving backend. The core API is: batch_infer(list<string> input) -> list<string> output. Multiple incoming single… | System Design | 12× | August 2026 |
| GPU Cluster / Inference Infrastructure System Design Design an inference serving system for a large language model (e.g., Claude) that minimizes latency and maximizes throughput across a GPU cluster.… | System Design | 7× | August 2026 |
| Chat System Design (1-on-1) Design a scalable real-time one-to-one (1:1) chat system. Only single-device (web) usage needs to be supported; group chat, channels, and multi-device sync… | System Design | 7× | August 2026 |
| Roofline Model Analysis A dedicated 'Performance Round' at Anthropic onsite (observed for ML infra and backend infra roles). The round is neither traditional coding nor… | System Design | 4× | September 2026 |
| GPU Allocation for Mixed Large/Small Model Inference You are given an inference system with a shared pool of exactly 8 GPUs. The system must serve two types of models… | System Design | 4× | September 2026 |
| System Design Doc Review A newer Anthropic onsite round (first observed April 2026) in which the candidate is given a pre-written system design document and asked… | System Design | 3× | April 2026 |
| Stream Large File to Many Machines A large file (e.g., an ML model or data artifact) resides in cloud storage. You need to distribute it to 1000 servers… | System Design | 2× | June 2026 |
| Amusement Park / Sharing System Product Design Design a sharing system for an amusement park application. The interviewer provides a Google Doc at the start containing a pre-drawn architecture… | System Design | 1× | April 2026 |
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