Prep for your OpenAI interview inside ChatGPT. It plays the interviewer.

• Add one URL and ChatGPT, Claude or Grok plays your interviewer, with the loops and questions on Land the Lab. You sign in once. There is no key to copy.
• It reaches 2,169 questions at 60 companies. 136 are reported at OpenAI and 64 at Anthropic.
• 1,058 prompts open in the chat for any member. The other 1,111, the recently asked and most asked ones, show a teaser until you unlock them.
• It gives you one question at a time and asks for your attempt first. The worked answer comes after, and only if you have unlocked it.
• 6 tools, 5 of them read only. The one that changes anything spends a credit, and only when you say yes.

Three steps in each assistant, then you prep where you already chat

Land the Lab runs a connector: a server your AI assistant can call while you talk to it (an MCP server, in the assistants’ terms). You add its URL once, sign in to Land the Lab in your browser and choose Allow. The URL is https://landthelab.com/mcp. These are the steps on our AI assistant page:

Meta Muse takes it as a custom connector today. You can remove the connection any time in your assistant or under Settings → API tokens on Land the Lab.

It reaches 2,169 questions at 60 companies, 1,524 of them coding

The assistant sees what you see on the site. That is every company page, 47 of them with a known loop, and every question, newest first. It can filter by company, type and round. 487 questions have an official worked answer.

1. Coding1,524 questions
2. System design377 questions
3. AI/ML design143 questions
4. Behavioral81 questions
5. OO design44 questions

For the labs: OpenAI has 136 reported questions, Anthropic 64 and SpaceXAI 47. Ask for a company and the assistant starts from its loop, round by round, with the questions each round asks most.

1,058 prompts are open in the chat. The 1,111 asked recently or most need an unlock

A question is locked when a company asked it in the last 6 months or it is among that company’s 10 most asked. The connector follows the same rule as the site, because it reads the same pages. On a locked question your assistant gets the title, the companies, the round, when it was last asked and a short teaser. The full prompt never leaves our server until you unlock it. At the labs, most of them are locked:

112 of OpenAI’s 136 questions (82%) are locked: most of them were asked in the last 6 months. New accounts get 3 credits. One credit unlocks one question for good, its prompt and its answers. A paid plan opens all of them. On an open question the prompt is free and the worked answer takes the same one credit.

An example: one OpenAI question, attempt first, answer after

This is an illustration of how a session goes, written from the connector’s tools and the messages it returns. Your assistant’s words will differ. The question is real: Text editor with undo and redo, reported at OpenAI and open to every member.

The assistant is told to work this way: ask the company and date, walk the loop, give one question at a time, let you try first, and only then fetch the answer. Those are instructions to the model. The locks are enforced on our server.

What it won’t do, and the limits

• It can’t read a locked prompt or answer. It is told never to guess or rebuild one. It offers an unlock, links the question page or moves to an open question.
• It changes nothing but your credits, and only when you ask. 5 of its 6 tools only read. The other is unlock_question.
• Work in the chat isn’t saved to Land the Lab. Your canvas, the code runner with tests by level and the AI tutor are on each question’s page. Diagrams in an answer show as a link to that page.
• It reads your prep, it doesn’t set it. It sees your target company, interview date, progress and credits. You set the target on My prep.
• Too many questions too fast and it has to wait, the same limit as opening question pages on the site.
• The replies are your assistant’s. Land the Lab sends the loops, questions and answers. Your assistant’s model writes what you read, under your assistant plan’s own limits.

What to ask first

1. “I have an Anthropic onsite in three weeks. Walk me through the loop.” Lays out the loop round by round, with the questions each round asks most.
2. “Give me OpenAI's most asked coding question. Let me try it before you show the answer.” Plays the interviewer: one question at a time, your attempt first, then the worked answer if you've unlocked it.
3. “What should I work on next in my prep?” Reads your prep target on Land the Lab and picks the next question you haven't done.

Developers and reviewers can read each tool’s inputs and outputs in the tool documentation.