QuantAI · Vertex Engineering AI operating model

Which AI for which task

Three approved platforms, one deliberate choice. Answer up to four questions and land on a defensible tool in about ten seconds.

Rule of thumb

Copilot for work inside your Microsoft files and inbox. Claude for careful drafting, structure and review of long documents. ChatGPT for open-ended thinking, research framing and quick generation.

Out of bounds for every tool: engineering design, calculation, verification or certification. A qualified engineer owns and signs the technical work, unaided by AI on the engineering content. This tool is for the words and admin around the work, never the engineering itself.

Question 1 of 4

Flagged as sensitive: your answer stays inside the firm's approved enterprise tools only.

Recommended

Confidentiality: this material is sensitive, so use the approved enterprise tier only (Copilot in the tenant, ChatGPT Enterprise or Claude Team). Never a personal or free account.

Full approved-use matrix

Task	Copilot	Claude	ChatGPT	Primary choice and why
Summarise a Teams meeting you attended	Primary	Avoid	Avoid	Copilot has the transcript and stays in-tenant
Draft a reply inside Outlook	Primary	Also fine	Also fine	Copilot has the thread; others need copy-paste
Turn a messy Excel export into a status narrative	Primary	Also fine	Also fine	Copilot reads the sheet directly
Draft a long technical report section from an engineer's notes	Also fine	Primary	Also fine	Claude is strongest at long, structured, careful drafting
QA a report draft for structure, clarity and consistency	Avoid	Primary	Also fine	Review-style work with a firm checklist; a human still signs
Draft a proposal from a structured bid brief	Also fine	Primary	Also fine	Long-form, reuse-heavy, consistency matters
Brainstorm approaches to a client problem	Also fine	Also fine	Primary	Open-ended generation, breadth of angles
Research framing and background reading structure	Avoid	Also fine	Primary	Fast, broad, good for scoping (verify all facts)
Rewrite text to a firm tone or shorter length	Also fine	Primary	Also fine	Claude holds voice and structure well
Draft internal policy or process documentation	Also fine	Primary	Also fine	Structured, reusable, review-bound
Engineering design, calculation, verification or certification	Avoid	Avoid	Avoid	Out of bounds. A qualified engineer owns it, unaided by AI on the technical content