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AI-Powered Case Interview Preparation

Master McKinsey, BCG, and Bain case interviews. Practice live with interactive partner-style simulations and receive instant, structured feedback on framework, math, and synthesis.

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preppartnr - AI-Powered Case Interview Preparation for MBB & Tech (McKinsey, BCG, Bain)

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A Free Claude Prompt for Case Interview Practice

Anthropic's Claude 3.5 & 3.7 Sonnet models are celebrated for deep analytical reasoning and nuanced prose. Here's how to turn Claude Voice into a mock case interviewer, along with what to watch out for. Want Real MBB Case Evaluation? Try PrepPartnr Voice Practice: Sub-second real-time voice, strict MECE issue tree audits, and automated math checking.

The Prompt for Claude

Paste this at the start of a new Claude conversation: You are an engagement manager at a top-tier strategy consulting firm (McKinsey, BCG, or Bain) conducting a case interview. Your job is to test my structured problem-solving, not to teach me. Rules: 1. Give me one realistic case prompt (2-3 sentences) covering profitability, market entry, M&A, pricing, or market sizing — pick one at random and tell me which. 2. Wait for me to lay out my structure before giving me any data. Do not offer hints unless I explicitly ask. 3. Once I share my framework, push back on any part that isn't MECE, and ask me to defend my prioritization. 4. Feed me data only when I ask a clarifying question that would realistically surface it. If my question is vague, ask me to be more specific instead of answering. 5. Include at least one case-math calculation with realistic numbers I have to compute out loud. 6. At the end, ask me for a synthesized recommendation before giving feedback. 7. Grade me on four dimensions — structure, hypothesis-driven thinking, quantitative rigor, communication — each 1-5, with one specific example from this session per score. Stay in character as the interviewer until I say "end case" — don't break out to explain your reasoning mid-session.

How to Use With Claude Voice

Open the Claude mobile app, paste the prompt as your first text message, then tap the voice button to begin your audio session. Speak through your hypothesis and framework out loud.

Claude 3.5 & 3.7 Sonnet Capabilities & Case Limitations

Claude 3.5 and 3.7 Sonnet offer exceptional qualitative reasoning, clear prose, and thoughtful speech output. However, in a raw Claude voice session: 1. **Collaborative Advisor Alignment**: Claude defaults to behaving like a thoughtful research colleague rather than a tough MBB interviewer pushing you on time pressure and prioritization. 2. **No Quantitative Calculation Gates**: Claude will often accept your verbal math summaries without auditing every intermediate calculation step. 3. **Lack of Performance Analytics**: Claude does not record your scores or track your weak areas across multiple practice cases.

Frequently Asked Questions

Does Claude Voice support real-time audio on desktop?

Claude Voice is currently primarily available in the Claude mobile app (iOS & Android). On desktop, you can use speech-to-text or pair it with PrepPartnr for seamless desktop voice practice.

How does PrepPartnr compare to Claude for case practice?

While Claude has outstanding reasoning, PrepPartnr integrates top-tier voice models with custom MBB rubric state machines, quantitative calculation checkers, and session analytics.

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