AI Workbench · Level 7 of 15
Answers with sources
Level 7 of 15 in the AI Workbench: a free AI exercise at Intermediate level, which takes about 25 minutes. Tune chunking, retrieval and a refusal threshold so the assistant cites the right section and says so when the documents do not answer.
Free · no download · about 25 minutes. Your work is saved on this device. Updated 18 Oct 2026.
The brief
- Client
- Brightleaf Home (fictional, hosted by OFORO)
- Site
- OFORO prompt desk
- Work order
- OFR-WO-107
- Data set
- Company documents
- Task code
- AIW-07
- Difficulty
- Intermediate
- Type of work
- Retrieval
Tune chunking, retrieval and a refusal threshold so the assistant cites the right section and says so when the documents do not answer.
Skills you practise
- Chunking
- BM25 retrieval
- Citations
- Refusing to guess
What the test checks
The acceptance test marks the skills this level practises.
- Chunking
- BM25 retrieval
- Citations
- Refusing to guess
In this lab
- Train models in your browser
- Vision inspection, prompts, RAG and safe agents
- Check the AI's work before you trust it
Levels in the AI Workbench
Previous: Prompt to specNext: A safe agent
- Data health check
- Train and evaluate without leakage
- Choose the metric and the threshold
- Overfitting: tune the tree
- Vision inspection on the conveyor
- Prompt to spec
- Answers with sources
- A safe agent
- Fairness check
- Privacy first
- Check the AI's work: finance
- Check the AI's work: HR
- Check the AI's work: marketing
- Check the AI's work: healthcare
- Check the AI's work: project management
Part of the AI Workbench
Prepare data, train a model and check the AI's work against a brief.
Feeds these internships: AI and Machine Learning, Data Science and Analytics, Generative AI and Prompt Engineering, AI Agents and Automation, Computer Vision, AI for Finance and Accounting, AI for HR and Recruitment, AI for Digital Marketing and Content, AI in Healthcare and Pharma, AI for Project Management.